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low-profile Dual-Polarized Planar Antenna with Compact Structure for Base Stations

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Chinese Journal of Electronics 2017年第5期26卷 1092-1095页

作者： LIU Ying WANG Jiu GONG Shuxi Science and Technology on Antenna and Microwave Laboratory Collaborative Innovation Center of Information Sensing and UnderstandingXidian University

A low-profile dual-polarized planar antenna with compact structure for 2.4GHz Wireless local area network(WLAN) and 2.5GHz Long term evaluation(LTE2500) base stations is proposed.A combination of a planar radiator and compact Artificial magnetic conductor(AMC) reflector is utilized to achieve a full planar structure without adding extra matching circuit,an extremely low-profile of 0.127 wavelength,as well as a high front to back ratio(F/B) of 25 *** antenna is fabricated to test the performance such as S-parameters,radiation patterns and peak *** results show the suitability of the proposed antenna for 2.4GHz WLAN and LTE2500 applications.

关键词： low profile Planar Compact structure Base station antenna

A low-profile Cylindrical Dielectric Resonator Antenna with Bandwidth-Enhancement Under Triple-Mode Resonance

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Journal of Communications and Information Networks 2020年第4期5卷 447-456页

作者： Sen Gao Nengwu Liu Guang Fu 不详 State Key Laboratory of Millimeter Waves Nanjing 210096China

A low-profile cylindrical dielectric resonator antenna(CDRA)with enhanced impedance bandwidth is proposed via sharing a single triple-mode dielectric ***,the resonant frequencies of TM01d and TM02d modes of a conventional CDRA are maintained far away from each other under central probe ***,a circular disk with an annular ring is loaded around the conventional CDRA,aiming to excite an additional mode between these dual *** electric fields demon-strate that the previous TM_(02δ) mode is transformed into the TM03d mode for the modified CDRA,and an additional TM_(02δ) mode is successfully excited between the TM_(01δ) and TM_(03δ) *** a result,the resonant frequencies of these three radiative modes are reallocated in proximity to each other,thus achieving the desired bandwidth *** addition,considering the small input impedance of the CDRA,a microstrip feeding line is introduced underneath the central probe for good impedance *** these arrangements,the resultant antenna can generate an extended bandwidth under simultaneous radiation of TM_(01δ),TM_(02δ),and TM_(03δ) ***,the proposed CDRA is designed,fabricated,and measured to validate the predicted *** simulated and measured results show that the impedance bandwidth(|S11|low profile property of about 0.15 free space wavelength is achieved as well.

关键词： dielectric resonator antenna triple-mode resonance wide impedance bandwidth low profile

赫优讯发布low profile型计算机工业通信板卡

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自动化应用 2012年第4期 4-4页

德国赫优讯于近日正式发布low profile型PCI Express接口计算机板卡cifX70E,进一步扩展了其cifX系列计算机通信板卡产品。该型号板卡具有半高(low profile)的设计,适用于安装在紧凑型IPC或HMI终端。

关键词：赫优讯计算机 PCI 通信板卡 low profile

A Planar 4-Bit Reconfigurable Antenna Array Based on the Design Philosophy of Information Metasurfaces

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Engineering 2022年第10期17卷 64-74页

作者： Zheng Xing Wang Hanqing Yang Ruiwen Shao Jun Wei Wu Guobiao Liu Feng Zhai Qiang Cheng Tie Jun Cui State Key Laboratory of Millimeter Waves School of Information Science and EngineeringSoutheast UniversityNanjing 210096China The Institute of Electromagnetic Space Southeast UniversityNanjing 210096China

Inspired by the design philosophy of information metasurfaces based on the digital coding concept,a planar 4-bit reconfigurable antenna array with low profile of 0.15λ0(whereλ0is the free-space wavelength)is *** array is based on a digital coding radiation element consisting of a 1-bit magnetoelectric(ME)dipole and a miniaturized reflection-type phase shifter(RTPS).The proposed 1-bit ME dipole can provide two digital states of"0"and"1"(with 0°and 180°phase responses)over a wide frequency band by individually exciting its two symmetrical feeding *** designed RTPS is able to realize a relative phase shift of 173°.By digitally quantizing its phase in the range of 157.5°,additional eight digital states at intervals of 22.5°are *** achieve low sidelobe levels,a 1:16 power divider based on the Taylor line source method is employed to feed the array,A prototype of the proposed 4-bit antenna array has been fabricated and tested,and the experimental results are in good agreement with the *** beams within a±45°range were measured with a maximum realized gain of 13.4 dBi at12 *** sidelobe and cross-polarization levels are below-14.3 and-23.0 dB,***,the beam pointing error is within 0.8°,and the 3 dB gain bandwidth of the broadside beam is 25%.Due to its outstanding performance,the array holds potential for significant applications in radar and wireless communication systems.

关键词： 4-bit reconfigurable antenna array Information metasurface Digital coding method low sidelobe low profile

Wideband Microstrip Antenna in Small Volume Without Using Fundamental Mode

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Electromagnetic Science 2023年第2期1卷 71-76页

作者： Yongjian Zhang Yue Li Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 10084China

Microstrip antennas are of significant interest and extensively utilized in communication systems because of their unique low ***,the general difficulty in microstrip antenna design lies in its wideband electromagnetic radiation within a low-profile *** enhance the bandwidth,superposing the fundamental mode and other high-order modes is the most common method,but this occupies a larger footprint than regular narrow-band ***,as a counterintuitive way to broaden the bandwidth,a wideband miniaturized microstrip antenna is proposed by using two high-order *** avoidance of the fundamental mode allows for footprint miniaturization without decreasing the bandwidth,providing a different but feasible design strategy for wideband microstrip *** with other microstrip antennas at the same profile,the proposed antenna achieves wider bandwidth and a smaller *** experimental result shows a bandwidth of 4.81–6.01 GHz is achieved with a volume of 0.47×0.47×0.043 λ_(0)^(3),whereλ0 represents the in-vacuum wavelength at the center ***,the proposed design provides an effective solution to the intrinsic contradiction between wideband electromagnetic radiation and compact antenna dimensions,not only in a low profile but in a small footprint,contributing to the fundamental development of microstrip antennas.

关键词： Microstrip antennas Wideband antennas High-order modes low profile Small footprint.

Broadband millimeter-wave metasurface antenna array withprinted ridge gap waveguide for high front-to-back ratio

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Journal of Information and Intelligence 2023年第1期1卷 11-22页

作者： Hao Yi Yajie Mu Jiaqi Han Long Li The Key Laboratory of High Speed Circuit Design and EMC of Ministry of Education School of Electronic EngineeringXidian UniversityXi'an 710071China

A novel broadband metasurface (MTS) antenna array with high front-to-back ratio (FBR) is proposed for 28 GHz millimeter-wave applications. With slot pairs loaded on patch cells, an aperturecoupled slotted-mushroom MTS antenna is designed to obtain broadband radiation characteristicswith a compact size. To suppress the backward radiation of this antenna, the printed ridge gapwaveguide (PRGW) technology with a perfect magnetic conductor (PMC) shielding made ofmushroom unit-cells underneath the microstrip feeding line is applied. On this basis, a 4×4 MTSantenna array with the PRGW feed network is developed. Simulated results show that the FBR canbe highly improved by over 16 dB within the entire bandwidth. To validate the design, a prototypeof the proposed antenna is fabricated. Measured results show that an FBR greater than 28 dB canbe obtained over a 24% impedance bandwidth (from 24.9 GHz to 31.7 GHz) with the reflectioncoefficient less than 10 dB. The measured antenna gain ranges from 17 dBi to 19.2 dBi and thecorresponding measured aperture efficiencies are 35% and 45.6%. The measured results alsosuggest that the proposed MTS antenna possesses -35 dB cross-polarization level and stable radiation patterns. In addition, the proposed antenna remains a very low profile of 1.7 mm (0.17λ_(0) at28 GHz). All the achieved features indicate that the proposed MTS antenna is an importantcandidate for B5G and 6G wireless communication.

关键词： Broadband Metasurface antenna Front-to-back ratio(FBR) Printed ridge gap waveguide technology (PRGW) low profile

A Novel Design of Wideband Frequency Antenna for WLAN

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A Novel Design of Wideband Frequency Antenna for WLAN