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A new feeding method for the circular polarization (CP) dielectric resonator antenna (DRA) is proposed in this letter. Two orthogonal modes (TExδ11, TEy1δ1,) of the rectangular DRA are excited by a 90° phase difference of the differential and common modes currents of the proposed feeding structure. To demonstrate the good CP performance of the proposed method, a right‐hand CP DRA for a global positioning system was designed. The impedance bandwidth of the proposed antenna for S1110 dB and 3 dB axial ratio bandwidth are about 5.4% and 1.95% at 1.57 GHz, respectively. 相似文献
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《Antennas and Propagation, IEEE Transactions on》2008,56(9):2810-2816
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This paper presents an overview of dielectric patch(DP) antennas developed in recent years.The employed DP resonator composed of a DP and a bottom substrate is analyzed comprehensively here,enabling the easy realization of a quasi-planar DP antenna. It combines the dual advantages of the conventional microstrip patch(MP) antenna and dielectric resonator(DR) antenna in terms of profile, gain,bandwidth, radiation efficiency, and design freedom.Furthermore, the DP antenna inherits the multi-mode ch... 相似文献
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Kah-Wee Khoo Yong-Xin Guo Ling Chuen Ong 《Antennas and Propagation, IEEE Transactions on》2007,55(7):1929-1932
A circularly polarized quadruple strip feed cylindrical dielectric resonator antenna utilizing a pair of 90deg hybrid couplers is investigated experimentally. The antenna is shown to deliver an impedance bandwidth (S11 < -10 dB) of 34.5%, from 1.75 to 2.48 GHz, and an axial-ratio bandwidth (AR < 3 dB) of 25.9%, from 1.65 to 2.14 GHz. The gain and radiation patterns are found to be stable within the passband. 相似文献
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Tze-Hsuan Chang Jean-Fu Kiang 《Antennas and Propagation, IEEE Transactions on》2007,55(5):1254-1259
A broadband dielectric resonator (DR) antenna is proposed, which consists of a rectangular DR coated with metal on three sides and placed on a ground plane. The structure is analyzed by modelling the dielectric-air interface as perfect magnetic conductor (PMC). A coplanar waveguide (CPW) with terminating slots is used to feed the antenna. Measurement results exhibit a wide bandwidth of about 47% over which the Ethetas pattern on the horizontal plane is nearly omnidirectional. The 10-dB bandwidth of this broadband DR monopole covers 4.2-6.8 GHz. Hence, it can be used for WLAN 802.11a applications 相似文献
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A new half-hemispherical dielectric resonator antenna (h-HDRA) is proposed and a two-element h-HDRA configuration is employed to design a broadband monopole-type radiator. Two half sections of a hemispherical DRA are employed to enhance the impedance bandwidth by introducing an additional resonant mode. Since the new geometry of an h-HDRA is studied here for the first time, it is characterized using simulation and experimental studies. Two closely spaced resonant modes, which in a two-element h-HDRA generate monopole-type radiation are investigated. Results for both the single and two-element h-HDRAs are presented. As much as 35% impedance bandwidth (S11<-10dB) with more than 5 dBi peak gain, 99.08% efficiency and monopole-type radiation pattern has been demonstrated using a prototype occupying a compact volume measuring 0.48lambda0 by 0.2lambda0 approximately, lambda0 being the wave length corresponding to the center of the impedance bandwidth 相似文献
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《Antennas and Propagation, IEEE Transactions on》2006,54(9):2657-2662
A new four-element cylindrical dielectric resonator (CDR) array is proposed as a wideband low profile monopole-like antenna. Unlike previous investigations, the present antenna is easy to design and excite as it employs the dominant$ HEM_11delta$ mode in each CDR. Ansoft's HFSS based design data and experimental results are presented. As much as 29% matching bandwidth$( S_11≪-10 dB)$ with monopole-like radiation pattern over the entire band has been achieved with 4 dBi peak gain from a prototype occupying a very compact space measuring$0.6lambda_0$ by 0.1$lambda_0$ approximately. 相似文献
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Ru‐Ying Sun 《ETRI Journal》2015,37(1):26-31
Axial‐ratio (AR) bandwidth enhancement is achieved for a circularly polarized (CP) cylindrical dielectric resonator antenna (DRA) using a wideband hybrid coupler (WHC) combined with dual probe feed. The presented WHC, comprised of a Wilkinson power divider and a wideband 90° shifter, delivers good characteristics in terms of 3 dB power splitting and consistent 90° (±5°) phase shifting over a wide bandwidth. In turn, the proposed CP DRA, for the employment of the WHC, in place of conventional designs, provides a significant enhancement on AR bandwidth and impedance matching. The antenna prototype with the WHC exhibits a 3 dB AR bandwidth of 48.66%, an impedance bandwidth of 52.5% for voltage standing wave ratio (VSWR) ≤ 2, and a bandwidth of 44.66% for a gain of no less than 3 dBi. Experiments demonstrate that the proposed WHC is suitable for broadband CP DRA design. 相似文献
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研究介绍了一种偏向辐射的介质谐振器天线设计方法.基于探针馈电圆柱形介质谐振器天线,在偏离馈电一侧对介质谐振器进行穿孔,并进行金属孔化.通过分析优化穿孔的大小与位置,实现了圆柱形介质谐振器天线的偏向辐射.仿真与实验吻合较好,结果表明:天线的10 dB相对阻抗带宽为7%,覆盖频率范围6.3~6.7 GHz,在阻抗带宽内,偏向辐射角度稳定在36°~37°,天线增益为6.0~7.2 dBi. 相似文献
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Bin Li Kwok Wa Leung 《Antennas and Propagation, IEEE Transactions on》2008,56(2):353-359
A differentially fed rectangular dielectric resonator antenna (DRA) is studied using the finite-difference time-domain (FDTD) method. The fundamental TE111 mode of the rectangular DRA is excited at 2.4 GHz, with a 10-dB differential impedance bandwidth (|Sdd11| < -10 dB) of ~10.4%. To verify the theory, measurements were carried out, and reasonable agreement between theory and experiment is obtained. The effects of the magnitude and phase imbalances on the DRA impedance and radiation pattern are investigated. 相似文献
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Kumar Gaurav Singh Mahender Ahlawat Sarita Yaduvanshi Rajveer S. 《Wireless Personal Communications》2019,109(3):1661-1672
Wireless Personal Communications - In this article, we present the study to improve the bandwidth of the dielectric resonator antenna (DRA) excited by aperture coupled feed by using a stacked DRA... 相似文献
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Pathak Deepika Sharma Sudhir Kumar Kushwah Vivek Singh 《Wireless Personal Communications》2020,111(1):235-243
Wireless Personal Communications - This article shows a dual-band ring di-electric resonator antenna for Wi-MAX applications. The suggested antenna is made up of several elements of ring... 相似文献
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《Antennas and Propagation, IEEE Transactions on》2008,56(11):3404-3410
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Wireless Personal Communications - In this paper, multilayer feeding network for linear slot array antenna is studied. A substrate integrated waveguide (SIW) corporate-feed network for linear slot... 相似文献
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设计了一款新型的具有谐波抑制能力的圆极化整流天线。在圆环缝隙天线的中心挖圆形孔,控制天线的谐振频带与抑制高次谐波。在缝隙的内边缘开两个半圆形槽,缩减天线的尺寸并获得圆极化辐射。倍压整流电路有效地提高了整流天线的输出直流电压。仿真结构表明,天线谐振带宽(VSWR<2)为17.6%,圆极化带宽(AR<3 dB)达到3.7%。整流电路在0 dBm的输入功率时,能达到59%的整流效率和1.7 V的直流输出电压。该整流天线可作为无源射频识别(Radio Frequency Identification,RFID)标签的整流天线。 相似文献
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Bakshi Garima Vaish Arti Yaduvanshi Rajveer Singh 《Wireless Personal Communications》2019,108(2):895-905
Wireless Personal Communications - This paper presents a novel design of antenna using sapphire. An aperture coupled two- layer stacked rectangular dielectric resonator antenna structure design... 相似文献