The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform
Atif Shamim - One of the best experts on this subject based on the ideXlab platform.
-
A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications
IEEE Transactions on Antennas and Propagation, 2019Co-Authors: Kirill Klionovski, Mohammad S. Sharawi, Atif ShamimAbstract:Increasing data transfer rates for future millimeter-wave communications requires high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth, and simultaneous operation with orthogonal polarizations, are essential for telecommunication antennas. In this communication, we present a compact patch antenna array with a Butler matrix (BM) feed network for the frequency band of 26–31.4 GHz. The 16-element planar array has been designed to operate with the two linear orthogonal polarizations and provide ±42° beam switching. To ensure the wideband operation, a novel combination of planar couplers, crossovers, and phase shifters is designed to form the BM. A new phase-shifter topology is used which is based on a combination of open-short stubs and the Shiffman phase shifter. The design is fabricated on a low-cost Multilayer Board with a size of $120 \times 70 \times 1.62$ mm3. The size of the feeding network, which is implemented on a single Board, is $76 \times 23 \times 0.1$ mm3. The experimental measurements of return loss, mutual coupling, and radiation patterns confirm simulated results.
-
A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications
IEEE Transactions on Antennas and Propagation, 2019Co-Authors: Kirill Klionovski, Mohammad S. Sharawi, Atif ShamimAbstract:Increasing data transfer rates for future millimeter-wave communications requires high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth, and simultaneous operation with orthogonal polarizations, are essential for telecommunication antennas. In this communication, we present a compact patch antenna array with a Butler matrix (BM) feed network for the frequency band of 26-31.4 GHz. The 16-element planar array has been designed to operate with the two linear orthogonal polarizations and provide ±42° beam switching. To ensure the wideband operation, a novel combination of planar couplers, crossovers, and phase shifters is designed to form the BM. A new phase-shifter topology is used which is based on a combination of open-short stubs and the Shiffman phase shifter. The design is fabricated on a low-cost Multilayer Board with a size of 120 × 70 × 1.62 mm3. The size of the feeding network, which is implemented on a single Board, is 76 × 23 × 0.1 mm3. The experimental measurements of return loss, mutual coupling, and radiation patterns confirm simulated results.
Kirill Klionovski - One of the best experts on this subject based on the ideXlab platform.
-
A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications
IEEE Transactions on Antennas and Propagation, 2019Co-Authors: Kirill Klionovski, Mohammad S. Sharawi, Atif ShamimAbstract:Increasing data transfer rates for future millimeter-wave communications requires high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth, and simultaneous operation with orthogonal polarizations, are essential for telecommunication antennas. In this communication, we present a compact patch antenna array with a Butler matrix (BM) feed network for the frequency band of 26–31.4 GHz. The 16-element planar array has been designed to operate with the two linear orthogonal polarizations and provide ±42° beam switching. To ensure the wideband operation, a novel combination of planar couplers, crossovers, and phase shifters is designed to form the BM. A new phase-shifter topology is used which is based on a combination of open-short stubs and the Shiffman phase shifter. The design is fabricated on a low-cost Multilayer Board with a size of $120 \times 70 \times 1.62$ mm3. The size of the feeding network, which is implemented on a single Board, is $76 \times 23 \times 0.1$ mm3. The experimental measurements of return loss, mutual coupling, and radiation patterns confirm simulated results.
-
A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications
IEEE Transactions on Antennas and Propagation, 2019Co-Authors: Kirill Klionovski, Mohammad S. Sharawi, Atif ShamimAbstract:Increasing data transfer rates for future millimeter-wave communications requires high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth, and simultaneous operation with orthogonal polarizations, are essential for telecommunication antennas. In this communication, we present a compact patch antenna array with a Butler matrix (BM) feed network for the frequency band of 26-31.4 GHz. The 16-element planar array has been designed to operate with the two linear orthogonal polarizations and provide ±42° beam switching. To ensure the wideband operation, a novel combination of planar couplers, crossovers, and phase shifters is designed to form the BM. A new phase-shifter topology is used which is based on a combination of open-short stubs and the Shiffman phase shifter. The design is fabricated on a low-cost Multilayer Board with a size of 120 × 70 × 1.62 mm3. The size of the feeding network, which is implemented on a single Board, is 76 × 23 × 0.1 mm3. The experimental measurements of return loss, mutual coupling, and radiation patterns confirm simulated results.
Mohammad S. Sharawi - One of the best experts on this subject based on the ideXlab platform.
-
A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications
IEEE Transactions on Antennas and Propagation, 2019Co-Authors: Kirill Klionovski, Mohammad S. Sharawi, Atif ShamimAbstract:Increasing data transfer rates for future millimeter-wave communications requires high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth, and simultaneous operation with orthogonal polarizations, are essential for telecommunication antennas. In this communication, we present a compact patch antenna array with a Butler matrix (BM) feed network for the frequency band of 26–31.4 GHz. The 16-element planar array has been designed to operate with the two linear orthogonal polarizations and provide ±42° beam switching. To ensure the wideband operation, a novel combination of planar couplers, crossovers, and phase shifters is designed to form the BM. A new phase-shifter topology is used which is based on a combination of open-short stubs and the Shiffman phase shifter. The design is fabricated on a low-cost Multilayer Board with a size of $120 \times 70 \times 1.62$ mm3. The size of the feeding network, which is implemented on a single Board, is $76 \times 23 \times 0.1$ mm3. The experimental measurements of return loss, mutual coupling, and radiation patterns confirm simulated results.
-
A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications
IEEE Transactions on Antennas and Propagation, 2019Co-Authors: Kirill Klionovski, Mohammad S. Sharawi, Atif ShamimAbstract:Increasing data transfer rates for future millimeter-wave communications requires high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth, and simultaneous operation with orthogonal polarizations, are essential for telecommunication antennas. In this communication, we present a compact patch antenna array with a Butler matrix (BM) feed network for the frequency band of 26-31.4 GHz. The 16-element planar array has been designed to operate with the two linear orthogonal polarizations and provide ±42° beam switching. To ensure the wideband operation, a novel combination of planar couplers, crossovers, and phase shifters is designed to form the BM. A new phase-shifter topology is used which is based on a combination of open-short stubs and the Shiffman phase shifter. The design is fabricated on a low-cost Multilayer Board with a size of 120 × 70 × 1.62 mm3. The size of the feeding network, which is implemented on a single Board, is 76 × 23 × 0.1 mm3. The experimental measurements of return loss, mutual coupling, and radiation patterns confirm simulated results.
D. De Zutter - One of the best experts on this subject based on the ideXlab platform.
-
Prediction of the excess capacitance of a via-hole through a Multilayered Board including the effect of connecting microstrips or striplines
IEEE Transactions on Microwave Theory and Techniques, 1994Co-Authors: D. De ZutterAbstract:An integral equation-based quasi-static method is described for calculating the capacitance of Multilayer Board via's. The considered via geometry contains connecting strips, pads on the via, and a finite ground plane thickness. After showing that coupling through ground plane openings is very small for realistic configurations, via's are treated as a number of independent sections (one section per multiBoard layer). The influence of the geometric parameters on the via capacitance is examined; results are also compared with previous publications and with measurements.
K. Ishizaka - One of the best experts on this subject based on the ideXlab platform.
-
A Multilayer Board-type magnetic field probe with high spatial resolution and RF current estimation method for ICs
1999 International Symposium on Electromagnetic Compatibility (IEEE Cat. No.99EX147), 1999Co-Authors: N. Masuda, N. Tamaki, H. Wabuka, T. Watanabe, K. IshizakaAbstract:The authors describe how NEC and NEC Glass Components Co. Ltd. developed a magnetic field probe with high spatial resolution enabling the measurement of magnetic fields near IC packages and dense-printed circuit Boards (PCBs) so that RF currents can be estimated. The design of the magnetic field probe is based on a Multilayer Board, and achieves spatial resolutions at least 1.8 times those of previous probes, as well as a reduction by up to 30% in the external dimensions of the detection unit (loop area is 0.2 x 8.4 mm). They also developed a test-Board design and a magnetic-field measuring method over a printed wiring pattern (microstrip line) which can be applied to LSI testers.
-
RF current evaluation of ICs by MP-10L
Nec Research & Development, 1999Co-Authors: N. Masuda, N. Tamaki, H. Wabuka, T. Watanabe, K. IshizakaAbstract:NEC has developed a magnetic field probe with high spatial resolution that enables the measurement of magnetic fields near IC packages and printed circuit Boards (PCBs) so that RF currents can be evaluated. This magnetic field probe is designed based on a Multilayer Board, and achieves spatial resolutions of at least 1.8 times greater than those of previous probes as well as a 70% reduction in the area dimensions of the detection unit (loop area is 0.2 × 8.4mm). We have also developed a test Board design and a magnetic field measuring method above a printed wiring pattern (microstrip line) which can be applied to LSI testers. The magnetic field above a wiring pattern connected to different power supply leads of actual ICs is measured and the RF current of each power lead pin is calculated. Model MP-10L is commercially available from NEC Glass Components Co., Ltd. The outer dimensions are 12(W) × 60(H) × 19(D)mm.