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Kin-lu Wong - One of the best experts on this subject based on the ideXlab platform.
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Small-size LTE700/2300/2500 antenna and high-isolation antenna array using the same for the Laptop Computer
2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2013Co-Authors: Tsungju Wu, Kin-lu WongAbstract:Small-size LTE700/2300/2500 antenna (9 × 45 mm2) and high-isolation antenna array using the same for the Laptop Computer are presented. The two antennas are mounted along the top edge of the supporting metal plate to be disposed on the inner surface of the upper cover of the Laptop Computer. Improved isolation (measured S21 better than -30 dB in the LTE700 band and -26 dB in the LTE2300/2500 bands) between the two antennas is easily achieved by adjusting the supporting metal plate to have a length of about 110 mm in the longitudinal direction to the antenna array. The high isolation is obtained because the length is close to a quarter-wavelength of a frequency in the LTE700 band, which makes the excited surface currents in the supporting metal plate stronger in the longitudinal direction and hence causes weaker surface currents flowing along the top edge of the supporting metal plate. This behavior leads to high isolation of the LTE antenna array in this study.
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on the isolation of two lte700 2300 2500 antennas in the Laptop Computer
Microwave and Optical Technology Letters, 2013Co-Authors: Kin-lu Wong, Tsungju WuAbstract:A simple technique for achieving enhanced isolation between two long-term evolution (LTE)700/2300/2500 antennas for the multiple-input multiple-output operation in the Laptop Computer is presented.The two antennas are mounted along the top edge of the supporting metal plate, which is generally disposed on the inner surface of the upper cover of the Laptop Computer. Improved isolation (measured S21 better than −30 dB in the LTE700 band and −26 dB in the LTE2300/2500 bands) between the two antennas is easily achieved by adjusting the supporting metal plate to have a length of about 110 mm in the longitudinal direction (orthogonal to the lateral direction or the top-edge direction of the supporting metal plate). Because the length is close to a quarter wavelength of a frequency in the LTE700 band, the excited surface currents in the supporting metal plate will become stronger in the longitudinal direction, which hence causes weaker surface currents flowing along the top edge of the supporting metal plate. This behavior leads to enhanced isolation between the antennas mounted along the top edge of the supporting metal plate. Details of the proposed isolation technique are described, and the obtained results are presented and discussed. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1370–1375, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27555
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On the isolation of two LTE700/2300/2500 antennas in the Laptop Computer
Microwave and Optical Technology Letters, 2013Co-Authors: Kin-lu Wong, Tsungju WuAbstract:A simple technique for achieving enhanced isolation between two long-term evolution (LTE)700/2300/2500 antennas for the multiple-input multiple-output operation in the Laptop Computer is presented.The two antennas are mounted along the top edge of the supporting metal plate, which is generally disposed on the inner surface of the upper cover of the Laptop Computer. Improved isolation (measured S21 better than −30 dB in the LTE700 band and −26 dB in the LTE2300/2500 bands) between the two antennas is easily achieved by adjusting the supporting metal plate to have a length of about 110 mm in the longitudinal direction (orthogonal to the lateral direction or the top-edge direction of the supporting metal plate). Because the length is close to a quarter wavelength of a frequency in the LTE700 band, the excited surface currents in the supporting metal plate will become stronger in the longitudinal direction, which hence causes weaker surface currents flowing along the top edge of the supporting metal plate. This behavior leads to enhanced isolation between the antennas mounted along the top edge of the supporting metal plate. Details of the proposed isolation technique are described, and the obtained results are presented and discussed. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1370–1375, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27555
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high isolation 2 4 5 2 5 8 ghz wlan mimo antenna array for Laptop Computer application
Microwave and Optical Technology Letters, 2013Co-Authors: Kin-lu Wong, Huan Jynu JiangAbstract:An isolation technique for two small-size triband wireless wide area network (WLAN) multiple-input multiple-output (MIMO) Laptop Computer antennas covering the 2.4/5.2/5.8 GHz bands is presented. The proposed WLAN MIMO antennas have measured isolation of better than −21 dB in the 2.4 GHz band and −32 dB in the 5.2/5.8 GHz bands in this study. In addition to enhanced isolation achieved, good antenna efficiencies of better than about 70 and 90%, respectively, in the 2.4 GHz and 5.2/5.8 GHz bands are obtained for the two antennas. The WLAN MIMO antenna array having a planar structure of size 9 × 55 mm2 is to be mounted at the top edge of the supporting metal plate of the Laptop display. The two antennas can be fabricated at low cost on a thin FR4 substrate and are of a simple structure comprising a driven strip and a shorted strip, which provides two wide operating bands to cover the 2.4 and 5.2/5.8 GHz bands. Between the two antennas, there is an isolation element formed by a protruded ground plane and a spiral open slot embedded therein. The isolation element leads to enhanced isolation between the antennas in the 2.4/5.2/5.8 GHz WLAN bands and good antenna efficiencies for the antennas as well. Details of the isolation technique for the WLAN MIMO antennas are described, and the obtained results are presented and discussed. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:382–387, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27279
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High-isolation 2.4/5.2/5.8 GHz WLAN MIMO antenna array for Laptop Computer application
Microwave and Optical Technology Letters, 2013Co-Authors: Kin-lu Wong, Huan Jynu Jiang, Yeh Chun KaoAbstract:An isolation technique for two small-size triband wireless wide area network (WLAN) multiple-input multiple-output (MIMO) Laptop Computer antennas covering the 2.4/5.2/5.8 GHz bands is presented. The proposed WLAN MIMO antennas have measured isolation of better than -21 dB in the 2.4 GHz band and -32 dB in the 5.2/5.8 GHz bands in this study. In addition to enhanced isolation achieved, good antenna efficiencies of better than about 70 and 90%, respectively, in the 2.4 GHz and 5.2/5.8 GHz bands are obtained for the two antennas. The WLAN MIMO antenna array having a planar structure of size 9 times 55 mm 2 is to be mounted at the top edge of the supporting metal plate of the Laptop display. The two antennas can be fabricated at low cost on a thin FR4 substrate and are of a simple structure comprising a driven strip and a shorted strip, which provides two wide operating bands to cover the 2.4 and 5.2/5.8 GHz bands. Between the two antennas, there is an isolation element formed by a protruded ground plane and a spiral open slot embedded therein. The isolation element leads to enhanced isolation between the antennas in the 2.4/5.2/5.8 GHz WLAN bands and good antenna efficiencies for the antennas as well. Details of the isolation technique for the WLAN MIMO antennas are described, and the obtained results are presented and discussed. copy 2012 Wiley Periodicals, Inc.
Liangche Chou - One of the best experts on this subject based on the ideXlab platform.
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coupled fed shorted monopole with a radiating feed structure for eight band lte wwan operation in the Laptop Computer
IEEE Transactions on Antennas and Propagation, 2011Co-Authors: Ting-wei Kang, Kin-lu Wong, Liangche ChouAbstract:A coupled-fed shorted monopole with its feed structure as an effective radiator for eight-band LTE/WWAN (LTE700/GSM850/900/1800/ 1900/UMTS/LTE2300/2500) operation in the Laptop Computer is presented. The radiating feed structure capacitively excites the shorted monopole. The feed structure mainly comprises a long feeding strip and a loop feed therein. The loop feed is formed at the front section of the feeding strip and connected to a 50-Ω mini-cable to feed the antenna. Both the feeding strip and loop feed contribute wideband resonant modes to combine with those generated by the shorted monopole for the desired eight-band operation. The antenna size above the top shielding metal wall of the Laptop display is 4 × 10 × 80 mm3 and is suitable to be embedded inside the casing of the Laptop Computer. The proposed antenna is fabricated and tested, and good radiation performances of the fabricated antenna are obtained.
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Compact coupling-type antenna for WLAN/WiMAX operation in the Laptop Computer
2010 IEEE Antennas and Propagation Society International Symposium, 2010Co-Authors: Liangche Chou, Kin-lu Wong, Cliff WangAbstract:Conventional printed or metal-plate antennas have been applied in Laptop Computers [1]-[3] and are usually embedded in narrow spaces (usually less than or about 10 mm) between the casing of the Laptop Computer and the supporting metal frame of the display as internal antennas. For WLAN operation, the operating range is mainly limited to be about 100 meter. By incorporating the existing WLAN system with the new communication system of WiMAX (worldwide interoperability for microwave access) [4], which can provide a long operating range of up to about 30 miles with a high data rate of about 75 Mb/s for mobile broadband wireless access, seamless Internet access for wireless users becomes possible.
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bandwidth enhancement of the small size internal Laptop Computer antenna using a parasitic open slot for penta band wwan operation
IEEE Transactions on Antennas and Propagation, 2010Co-Authors: Kin-lu Wong, Wei Ji Chen, Liangche ChouAbstract:By embedding a parasitic open slot in the antenna ground of a small-size internal Laptop Computer antenna, enhanced bandwidth for the antenna's lower band to cover the GSM850/900 operation (824-960 MHz) can be achieved. The internal Laptop Computer antenna in this study is a small-size coupled-fed shorted T-monopole, whose length along the top edge of the display ground of the Laptop Computer is 43 mm only. The antenna can also provide a wide upper band to cover the GSM1800/1900/UMTS operation (1710-2170 MHz). With the inclusion of the parasitic open slot, the total antenna length along the top edge of the display ground is 48 mm only, and the occupied antenna volume is 10 × 3.5 × 48 mm3 above the top edge of the display ground, which is the smallest for the internal penta-band WWAN Laptop Computer antenna that have been reported for the present. Detailed results of the proposed parasitic open slot on bandwidth enhancement of the internal WWAN Laptop Computer antenna are presented.
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small size uniplanar coupled fed pifa for 2 4 5 2 5 8 ghz wlan operation in the Laptop Computer
Microwave and Optical Technology Letters, 2009Co-Authors: Shihjia Liao, Kin-lu Wong, Liangche ChouAbstract:A coupled-fed PIFA (printed inverted-F antenna) printed on a small-size FR4 substrate promising for 2.4/5.2/5.8 GHz WLAN (wireless local area network) operation in the Laptop Computer is presented. When mounted at the top edge of the system ground plane or supporting metal frame of the Laptop display, the PIFA shows a height of 9 mm and a small width of 7 mm only. With a narrow width, it is promising for more internal antennas to be mounted along the top edge of the supporting metal frame of the Laptop display. The PIFA also shows a uniplanar structure, allowing it easy to fabricate, and is fed using a T-shaped coupling strip, which leads to successful excitation of two wide operating bands to cover WLAN operation in the 2.4 GHz band and 5.2/5.8 GHz band. Details of the proposed PIFA are studied, and experimental and simulation results are presented. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1023–1028, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24206
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a small size internal dual band metal strip antenna for 2 4 5 ghz wlan operation in the Laptop Computer
IEEE Antennas and Propagation Society International Symposium, 2008Co-Authors: Liangche Chou, Kin-lu WongAbstract:This paper presents a novel small-size dual-band metal-strip antenna promising to operate as an internal Laptop antenna for WLAN operation in the 2.4 and 5 GHz bands has been proposed, fabricated and tested. The antenna is especially suited to be employed in the narrow spacing between the top edge of the display panel and the casing of the Laptop Computer. The antenna is formed by using two inverted-L metal strips, including one driven strip and one parasitic shorted strip, stacked together to achieve a compact configuration, which is different from the traditional shorted T-shaped monopole antenna or planar inverted-F antenna. This compact configuration leads to a small lateral length of 20 mm for the proposed antenna. The antennapsilas two resonant modes can be easily fine-adjusted to cover the desired operating bands. For the fabricated prototype studied in the paper, good radiation characteristics over the 2.4 and 5 GHz bands have been obtained. It is perspective that the proposed antenna will become a promising internal antenna for 2.4/5 GHz WLAN operation for Laptop Computer applications.
Shu Chuan Chen - One of the best experts on this subject based on the ideXlab platform.
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Integrated MIMO Slot Antenna on Laptop Computer for Eight-Band LTE/WWAN Operation
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Shu Chuan Chen, Chung-i G. Hsu, Po-wei Wu, Jasmine Y.y. SzeAbstract:This paper proposes a two-element multi-input multi-output (MIMO) open-slot antenna implemented on the display ground plane of a Laptop Computer for eight-band long-term evolution/wireless wide-area network operations. The metal surroundings of the antennas have been well integrated as a part of the radiation structure. In the single-element open-slot antenna, the nearby hinge slot (which is bounded by two ground planes and two hinges) is relatively large as compared with the open slot itself and acts as a good radiator. In the MIMO antenna consisting of two open-slot elements, a T slot is embedded in the display ground plane and is connected to the hinge slot. The T and hinge slots when connected behave as a radiator; whereas, the T slot itself functions as an isolation element. With the isolation element, simulated isolations between the two elements of the MIMO antenna are raised from 8.3–11.2 to 15–17.1 dB in 698–960 MHz and from 12.1–21 to 15.9–26.7 dB in 1710–2690 MHz. Measured isolations with the isolation element in the desired low- and high-frequency ranges are 17.6–18.8 and 15.2–23.5 dB, respectively. Measured and simulated efficiencies for the two-element MIMO antenna with either element excited are both larger than 50% in the desired operating frequency bands.
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integrated mimo slot antenna on Laptop Computer for eight band lte wwan operation
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Shu Chuan Chen, Chung-i G. Hsu, Po-wei Wu, Jasmine Y.y. SzeAbstract:This paper proposes a two-element multi-input multi-output (MIMO) open-slot antenna implemented on the display ground plane of a Laptop Computer for eight-band long-term evolution/wireless wide-area network operations. The metal surroundings of the antennas have been well integrated as a part of the radiation structure. In the single-element open-slot antenna, the nearby hinge slot (which is bounded by two ground planes and two hinges) is relatively large as compared with the open slot itself and acts as a good radiator. In the MIMO antenna consisting of two open-slot elements, a T slot is embedded in the display ground plane and is connected to the hinge slot. The T and hinge slots when connected behave as a radiator; whereas, the T slot itself functions as an isolation element. With the isolation element, simulated isolations between the two elements of the MIMO antenna are raised from 8.3–11.2 to 15–17.1 dB in 698–960 MHz and from 12.1–21 to 15.9–26.7 dB in 1710–2690 MHz. Measured isolations with the isolation element in the desired low- and high-frequency ranges are 17.6–18.8 and 15.2–23.5 dB, respectively. Measured and simulated efficiencies for the two-element MIMO antenna with either element excited are both larger than 50% in the desired operating frequency bands.
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Loop antenna for the LTE/WWAN metal-casing Laptop Computer
2017 IEEE International Conference on Computational Electromagnetics (ICCEM), 2017Co-Authors: Shu Chuan Chen, Hung-jiun JianAbstract:A coupled-fed loop antenna with a small occupied volume (35 mm × 8 mm × 3 mm) can be installed in the hinge slot region of Laptop Computers to cover the long term evolution (LTE) and wireless wide area network (WWAN) operation in the 698–960 MHz, and 1710–2690 MHz is presented. The coupled-fed loop antenna can be installed in the hinge slot region between the display ground and keyboard ground of Laptop Computers, without additional clearance region occupied by the antenna. With the integration of the hinge slot region in Laptop Computers, several resonant modes of the hinge slot can be excited to combine the resonant modes of the coupled-fed loop to cover the LTE/WWAN operation without increasing the antenna size. This makes the proposed antenna attractive for achieving full metal-casing Laptop Computer applications. The measured antenna efficiency is about 53–65% in the lower band and is about 58–72% in the upper band. Working principle of the proposed antenna on achieving LTE/WWAN dual-wideband operation is described in this study.
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Isolation enhancement of small-size WLAN MIMO antenna array for Laptop Computer application
Journal of Electromagnetic Waves and Applications, 2017Co-Authors: Shu Chuan Chen, Jasmine Y.y. Sze, Kai Jen ChuangAbstract:Single atom chemically doped graphene has been theoretically studied by density functional theory. The largest band gap, 0.62 eV, appears in arsenic atom doped graphene, then 0.60 eV comes by the tin atom, whose deformations can neither be ignored. It is also found that oxygen and iron single atom embedded graphene can open band gap by 0.52 and 0.54 eV, respectively. Moreover, doping O atom shows little distortion and high stability by charge redistribution. The band gap of Fe doped graphene is opened by orbital hybridization. The other heteroatom doped results are a little inferior to them.
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LTE/WWAN monopole antenna integration with hinge slot region in the Laptop Computer
2016 IEEE 5th Asia-Pacific Conference on Antennas and Propagation (APCAP), 2016Co-Authors: Shu Chuan Chen, Yu-chuan Tsou, Chih-chia HuangAbstract:A small-size LTE/WWAN monopole antenna integration with hinge slot region in Laptop Computer applications is presented. The monopole antenna is installed in the hinge slot between metal covers and hinges. By integrating the monopole antenna with the metal covers and hinges, not only several resonant modes of monopole structure but those of the hinge slot are also excited to cover the desired eight-band LTE/WWAN operation (LTE700/GSM850/900 and GSM1800/1900/UMTS/LTE2300/2500 bands). The antenna comprises a feeding strip and a folded strip that can be arranged in the hinge slot of the Laptop Computer. The proposed antenna can be integrated with the surrounding metal planes (metal covers) to enhance the operating bandwidth to cover LTE/WWAN band with good radiation efficiency. The antenna has a small area of only 25 mm∗8 mm. Over the lower and upper bands, the antenna efficiencies are about 65–88% and 55–78%, respectively.
Jasmine Y.y. Sze - One of the best experts on this subject based on the ideXlab platform.
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Integrated MIMO Slot Antenna on Laptop Computer for Eight-Band LTE/WWAN Operation
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Shu Chuan Chen, Chung-i G. Hsu, Po-wei Wu, Jasmine Y.y. SzeAbstract:This paper proposes a two-element multi-input multi-output (MIMO) open-slot antenna implemented on the display ground plane of a Laptop Computer for eight-band long-term evolution/wireless wide-area network operations. The metal surroundings of the antennas have been well integrated as a part of the radiation structure. In the single-element open-slot antenna, the nearby hinge slot (which is bounded by two ground planes and two hinges) is relatively large as compared with the open slot itself and acts as a good radiator. In the MIMO antenna consisting of two open-slot elements, a T slot is embedded in the display ground plane and is connected to the hinge slot. The T and hinge slots when connected behave as a radiator; whereas, the T slot itself functions as an isolation element. With the isolation element, simulated isolations between the two elements of the MIMO antenna are raised from 8.3–11.2 to 15–17.1 dB in 698–960 MHz and from 12.1–21 to 15.9–26.7 dB in 1710–2690 MHz. Measured isolations with the isolation element in the desired low- and high-frequency ranges are 17.6–18.8 and 15.2–23.5 dB, respectively. Measured and simulated efficiencies for the two-element MIMO antenna with either element excited are both larger than 50% in the desired operating frequency bands.
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integrated mimo slot antenna on Laptop Computer for eight band lte wwan operation
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Shu Chuan Chen, Chung-i G. Hsu, Po-wei Wu, Jasmine Y.y. SzeAbstract:This paper proposes a two-element multi-input multi-output (MIMO) open-slot antenna implemented on the display ground plane of a Laptop Computer for eight-band long-term evolution/wireless wide-area network operations. The metal surroundings of the antennas have been well integrated as a part of the radiation structure. In the single-element open-slot antenna, the nearby hinge slot (which is bounded by two ground planes and two hinges) is relatively large as compared with the open slot itself and acts as a good radiator. In the MIMO antenna consisting of two open-slot elements, a T slot is embedded in the display ground plane and is connected to the hinge slot. The T and hinge slots when connected behave as a radiator; whereas, the T slot itself functions as an isolation element. With the isolation element, simulated isolations between the two elements of the MIMO antenna are raised from 8.3–11.2 to 15–17.1 dB in 698–960 MHz and from 12.1–21 to 15.9–26.7 dB in 1710–2690 MHz. Measured isolations with the isolation element in the desired low- and high-frequency ranges are 17.6–18.8 and 15.2–23.5 dB, respectively. Measured and simulated efficiencies for the two-element MIMO antenna with either element excited are both larger than 50% in the desired operating frequency bands.
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Isolation enhancement of small-size WLAN MIMO antenna array for Laptop Computer application
Journal of Electromagnetic Waves and Applications, 2017Co-Authors: Shu Chuan Chen, Jasmine Y.y. Sze, Kai Jen ChuangAbstract:Single atom chemically doped graphene has been theoretically studied by density functional theory. The largest band gap, 0.62 eV, appears in arsenic atom doped graphene, then 0.60 eV comes by the tin atom, whose deformations can neither be ignored. It is also found that oxygen and iron single atom embedded graphene can open band gap by 0.52 and 0.54 eV, respectively. Moreover, doping O atom shows little distortion and high stability by charge redistribution. The band gap of Fe doped graphene is opened by orbital hybridization. The other heteroatom doped results are a little inferior to them.
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small size wlan mimo antenna array with high isolation for Laptop Computer application
Asia-Pacific Microwave Conference, 2014Co-Authors: Shu Chuan Chen, Jasmine Y.y. Sze, Kai Jen ChuangAbstract:This paper proposes an isolation technique for two small-size wireless local area network (WLAN) multiple-input multiple-output (MIMO) Laptop Computer antennas. The MIMO antenna array is designed to operate in the dual frequency bands covering the WLAN 2.4/5.2/5.8 GHz bands and has a small size, a low height, and a small thickness especially suitable for ultra-thin notebook Computers. The size of the designed antenna array has been reduced to about 40% those of the MIMO arrays appearing in the recent literature. The designed isolation element consists of two monopole slots between the antenna radiating elements. These two monopole slots have their respective lengths of a quarter-wavelength, one at 2.45 GHz and the other at 5.5 GHz. The isolation elements block the horizontal surface currents on the system's ground plane, leading to the reduction of the mutual coupling between the two source antennas and hence the excellent isolation between them. Results show that the proposed MIMO antenna array has good characteristics of antenna radiation efficiency, and impedance matching in the two bands of interest.
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Isolation-improved LTE MIMO antenna for Laptop-Computer applications
Antennas and Propagation (ISAP), 2014 International Symposium on, 2014Co-Authors: Shu Chuan Chen, Jasmine Y.y. SzeAbstract:A simple technique for achieving enhanced isolation between two long-term evolution (LTE) antennas operating at the LTE700/2300/2500 band for the multiple-input multiple-output (MIMO) operation in the Laptop Computer is presented. The two antennas are mounted along the top edge of the supporting metal plate, which is generally disposed on the inner surface of the upper cover of the Laptop Computer. Improved isolation (simulated S21 better than -17 dB in the LTE700 band and -30 dB in the LTE2300/2500 bands) between the two antennas is easily achieved. By arranging a pair of the isolation elements at two separate null current locations of the excited surface current distribution of the LTE700-band modes of the two antennas can improve isolation in the LTE700 band. It can effectively cause weaker surface currents flowing along the top edge of the supporting metal plate. Over the lower and upper bands, the antenna efficiencies are about 46-58% and 50-68%, respectively.
Changfa Yang - One of the best experts on this subject based on the ideXlab platform.
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A Compact Inverted-F Antenna to be Embedded in the Laptop Computer for Dual-Band WLAN Applications 1
2020Co-Authors: Ping-chih Chen, Changfa YangAbstract:In this paper, an inverted-F antenna with dual- band operations for 2.4/5 GHz WLAN applications in Laptop Computers is presented. This antenna is composed of a radiating strip, a feed and two meandered shorting strips, which are fabricated on a 0.4 mm thick FR4 substrate and occupy an area of only 3 × 35 mm 2 . Gain, pattern and efficiency of the antenna are measured in a spherical near-field antenna measurement anechoic chamber. Good performances are obtained. The proposed antenna can be embedded inside the Laptop Computer for dual-band WLAN systems.
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a compact inverted f antenna to be embedded in ultra thin Laptop Computer for lte wwan wimax wlan applications
International Symposium on Antennas and Propagation, 2011Co-Authors: Chuanling Hu, Changfa YangAbstract:A compact inverted-F antenna with multiband operations for LTE, WWAN, WiMAX and WLAN applications is presented. The antenna consists of multi-branch strips and is fabricated on both sides of the ceramic substrate, which has a compact size of 90(L)×10(W)×0.5(T) mm3 to be embedded inside an ultra-thin Laptop Computer as an internal antenna. Three operating bands covering 673–993 MHz, 1673–3153 MHz and 3316–3603 MHz for the LTE700/2300/2500, WWAN, WiMAX (2.3/2.5/3.5 GHz) and WLAN (2.4 GHz) systems are achieved with good radiation efficiencies.
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compact inverted f antenna with meander shorting strip for Laptop Computer wlan applications
IEEE Antennas and Wireless Propagation Letters, 2011Co-Authors: Changfa YangAbstract:In this letter, a novel compact inverted-F antenna with dual-band property for WLAN applications is presented. It comes with a C-shaped radiator and two meander shorting strips, which only occupy a small size of 35 (L)3 (W) mm to be easily embedded inside a Laptop Computer as an internal antenna. This design can radiate with two operating bands covering 2.38-2.54 and 4.99-5.96 GHz. By properly forming these two shorting strips, the effects due to the antenna near the external casing can be suitably tackled for actual application. Nearly omnidirectional coverage to enhance the communication quality can be obtained with our design. Therefore, the proposed antenna with a compact size is well suitable for WLAN operation in a Laptop Computer.
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A miniature multibranch inverted-F antenna to be embedded in the Laptop Computer for WWAN applications
Microwave and Optical Technology Letters, 2011Co-Authors: Chuanling Hu, Changfa YangAbstract:A novel miniature multibranch inverted-F antenna (IFA) suitable for penta-band Wireless Wide Area Network (WWAN) applications is presented. The antenna is fabricated on a direct bond copper substrate and consists of multibranch strips, which occupies a very small size of 83(L)× 7(W) × 0.5(H) mm3 to be easily embedded inside the Laptop Computer as an internal antenna. By properly designing the antenna operated as an inverted-F antenna, two frequency bands covering 813–993 and 1703–2196 MHz for the GSM850/900 and DCS/PCS/UMTS operations are achieved with good radiation efficiencies. Compared with other studies, the proposed antenna with a compact size is suitable to be installed in the Laptop Computer for the WWAN applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:547–550, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25802
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a compact multiband inverted f antenna for lte wwan gps wimax wlan operations in the Laptop Computer
IEEE Antennas and Wireless Propagation Letters, 2010Co-Authors: Chuanling Hu, Changfa YangAbstract:An inverted-F antenna with multiband operations for Long-Term Evolution (LTE700/2300/2500), wireless wide area network (WWAN), GPS, WiMAX (2.3/2.5/3.5 GHz), and WLAN (2.4 GHz) applications is presented. The antenna consists of multibranch strips and is fabricated on both sides of an Al2O3 ceramic substrate, which has a compact size of 97 (L) × 11.2 (W) × 0.5 (T) mm3 to be embedded inside the Laptop Computer as an internal antenna. Four operating bands covering 646-983, 1503-1589, 1696-2963, and 3396-3646 MHz for the LTE, WWAN, GPS, WiMAX (2.3/2.5/3.5 GHz) and WLAN (2.4 GHz) systems are achieved with good radiation efficiencies.
