- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore, India (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - High Performance Dual Circularly Polarized Microstrip Patch Antenna for Satellite Communication
摘要： High performance dual circularly polarized X-band microstrip patch antenna for satellite communication is presented in this paper. The high performance refers to high return loss, high isolation, high gain >8.5dBi and low cross polarization with axial ratio<2dB throughout the bandwidth 8–8.4GHz. This performance is achieved by using stacked substrate with square patch on the top layer and a 90? hybrid coupler on the bottom layer. The patch is electromagnetically coupled through the two apertures present on the ground plane which is fed by the branchline coupler present on the bottom substrate. Simulated and measured results shows that this basic element can be extended to form a phased array antenna due to its less weight,compact structure and high performance.
关键词： dual circular polarization,broadband antenna,low cross polarization,high isolation,Aperture coupled antenna
更新于2025-09-23 15:23:52
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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Low-Profile Dual-Polarized MIMO Antenna Array with High Isolation
摘要： A low-profile dual-polarized MIMO antenna array with high isolation is proposed in this paper. As is shown in this paper, the unit of the presented MIMO antenna array is two crossed dipole antennas. The height of the dipole antenna is just 10mm. It is a low profile because of the application of the AMC surface. As a result, the proposed MIMO antenna array can offer an impedance band from 2.50 GHz to 2.68 GHz when the VSWR is lower than 1.5. At the same time, The MIMO antenna array also presents great performance in radiation patterns, with the gain of 9dBi and the isolation between the two ports can reach 25dB. The proposed MIMO antenna array can be applied to the base stations.
关键词： Dual-polarized,Low-profile,High isolation,MIMO antenna array
更新于2025-09-23 15:22:29
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[IEEE 2018 China International SAR Symposium (CISS) - Shanghai (2018.10.10-2018.10.12)] 2018 China International SAR Symposium (CISS) - Design of Multi-Channel MMW Transmitter Module with High Isolation
摘要： This paper proposes a multi-channel millimeter wave transmitter module with high isolation between channels. For reducing its cost, one multi-layer FR4 board is used to realize the routing of DC and control signals in each channel. Power divider MMICs, capacitors, and resistors are sealed on the top metal layer of FR4. Furthermore, a Rogers 5880 board which implements the millimeter wave transmission, can obtain low insertion loss. In order to get high isolation between channels and series amplifiers, some metal iris walls are introduced to acquire better physical isolation. Electro-magnetic simulation of the cavity is demonstrated to push the resonant frequencies away from work frequency. Finally, the millimeter wave transmitter module is presented with an extremely low weight of only 41 grams by this technology, its output power greater than 35.5dBm and efficiency higher than 16 percent, respectively.
关键词： high isolation,millimeter wave,multi-channel,transmitter module
更新于2025-09-23 15:22:29
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Compact Wideband Dual-Polarized Antenna With High Isolation Using Modified Direct Feeding Structure For Indoor Beamforming Array Applications
摘要： A modified direct feeding (MDF) structure is proposed in this paper to realize a compact (45 × 45 mm2) wideband dual-polarized antenna with high isolation (33 dB) and low cross-polarization (30 dB). Compared with the conventional crossed dipole antennas, two additional pairs of dipoles are employed as coupling baluns as well as radiators. As a consequence, the proposed antenna with more symmetrical structure has the advantages of both the direct feeding (DF) and the coupling feeding (CF) structures, such as, balanced matching, high isolation, low cross-polarization and compact size. Besides, the gap structure between adjacent dipoles is designed in elliptical shape to further improve the impedance matching. The proposed antenna realizes a wide impedance bandwidth over 51% (1.7-2.85 GHz) for VSWR < 1.5. It is worth mentioning that compact size and high isolation could greatly reduce the element spacing of beamforming antenna array. In order to investigate the performance of beamforming array, a two-element array fed by out-of-phase power divider network is developed. The lowest operating frequency can be further extended to 1.6 GHz and the cross-polarization discrimination (XPD) is more than 10 dB within ± 60° of the main lobe.
关键词： wideband,high isolation,dual-polarized.,Modified direct feeding structure,compact
更新于2025-09-23 15:21:21
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Broadband Eight-Way Substrate Integrated Waveguide Radial Power Divider/Combiner With High-Isolation
摘要： A broadband eight-way substrate integrated waveguide (SIW) radial power divider/combiner with high-isolation is presented. The step probes are utilized to achieve broadband impedance matching and improve the return loss. What’s more, the star structure based on microstrip circuit is employed to improve the isolation performance. A two-layer SIW radial power divider/combiner is designed, fabricated and measured. Good agreement between simulated and measured results is achieved for the proposed power divider/combiner. The measured results show that both bandwidths of the input and output port are 25% and 20% when their return loss are lower than -15 dB. The measured output isolation is greater than 17.5 dB from 5.75 GHz to 7.85 GHz and greater than 20 dB from 6.8 GHz to 7.9 GHz. The presented eight-way SIW power divider/combiner has the advantage of wider bandwidth, lower return loss and insertion loss, and higher isolation between the outputs.
关键词： high-isolation,Power divider/combiner,broadband,substrate integrated waveguide
更新于2025-09-19 17:13:59
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Rapid Hot Carrier Relaxation and Mobility Increase in Sn- and Pb-Containing Halide Perovskite Semiconductors
摘要： This paper proposes a novel planar dual-band coupled-line balun with impedance transformation and high isolation. Closed-form design equations are obtained based on the classical even-odd mode equivalent approach. For convenience of designing and synthesizing such a novel dual-band balun, the practical ranges of the frequency ratio, terminated impedances, and two free variables are provided under the conventional microstrip fabrication constraints. By adopting four coupled-line sections, six transmission-line stubs, and an isolation resistor, a microstrip prototype balun working at 1.0/2.6 GHz is designed, fabricated, and measured. There is a good agreement between the simulated and measured results. The wide bandwidths of 290 MHz from 0.83 to 1.12 GHz and 270 MHz from 2.44 to 2.71 GHz are obtained with the measured return losses (|S11|, |S22|, |S33|) and the isolation (|S23|) better than 10 dB, which effectively confirm the proposed theoretical predictions.
关键词： dual band,Coupled-line balun,impedance transformation,high isolation
更新于2025-09-19 17:13:59
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[IEEE 2019 8th International Symposium on Next Generation Electronics (ISNE) - Zhengzhou, China (2019.10.9-2019.10.10)] 2019 8th International Symposium on Next Generation Electronics (ISNE) - Compact Dual-Mode Ridge Waveguide Dual-Band Filter
摘要： A novel dual-mode ridge waveguide structure is proposed to design dual-band bandpass filter in this paper. This new configuration achieves to realize two orthogonal resonant modes which allows for independent control of the two resonant frequencies. In addition, a transmission zero is introduced in the guard-bands improving the filter selectivity, while keeping a simple and compact inline topology.
关键词： ridge waveguide,transmission zero,resonator,Dual-mode,high isolation
更新于2025-09-16 10:30:52
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A high‐isolation dual‐polarized quad‐patch antenna fed by stacked substrate integrated waveguides for millimeter‐wave application
摘要： A high-isolation dual-polarized quad-patch antenna fed by stacked substrate integrated waveguide (SIW) that is suitable for millimeter-wave band is proposed in this paper. The antenna consists of a quad-patch radiator, a two-layer SIW feeding structure and two feeding ports for horizontal and vertical polarization. The two-layer stacked SIW feeding structure achieves the high isolation between the two feeding ports (|S21| ≤ ?45 dB). Based on the proposed element, a 1 × 4 antenna array with a simple series-fed network is also designed and investigated. A prototype working at the frequency band from 38 to 40 GHz is fabricated and tested. The results indicate that the proposed antenna has good radiation performance at 38 GHz that covers future 5G applications.
关键词： millimeter-wave,high-isolation,series-fed,dual-polarized,substrate integrated waveguide
更新于2025-09-16 10:30:52
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[IEEE 2018 International Applied Computational Electromagnetics Society Symposium - China (ACES) - Beijing, China (2018.7.29-2018.8.1)] 2018 International Applied Computational Electromagnetics Society Symposium - China (ACES) - Dual-band Branch Line Coupler with High Isolation Isolation Using Loaded Coupled Lines
摘要： A novel dual-band branch line coupler with high power division isolation using coupled lines is proposed. A conventional coupler loaded with quarter-wavelength open coupled lines is adopted to realize the dual bands. Each band has a high isolation due to the introduced transmission zeros. The center frequencies of the planar coupler can be adjusted over a wide frequency band. A planar dual-band couplers located at 0.75/1.32 GHz is designed and fabricated for verification.
关键词： Branch line coupler,dual-band operation,high isolation,open/shorted coupled lines
更新于2025-09-16 10:30:52
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High-isolation diplexer based on dual-mode substrate integrated waveguide resonator
摘要： A high-isolation diplexer based on a dual-mode substrate integrated waveguide (SIW) resonator is proposed in this paper. Based on the theory of the dual-mode resonator, the miniaturized diplexers are designed by using the SIW dual-mode resonators. The superior isolation of the diplexers is obtained because the two operating modes of the dual-mode SIW resonators are not directly coupled and there is no interference with each other. In order to further improve the isolation of the circuit, the number of the order of the diplexer is added. Equivalent circuits are given to analyze and design the dual-mode high-isolation diplexers. Detailed analyses are given according to the equivalent circuits. The dual-mode third-order and fourth-order diplexers are designed and fabricated. The measured results agree well with the simulated ones. The total sizes of the fabricated third-order and fourth-order diplexers are 1.78λg × 2.64λg and 1.79λg × 3.63λg, respectively.
关键词： dual-mode resonator,substrate integrated waveguide,High isolation,diplexer
更新于2025-09-11 14:15:04