Wideband Quasi-Monostatic Simultaneous Transmit and Receive Reflector Antenna

被引：17
|
作者：
Prasannakumar, Prathap Valale [1 ,2 ]
Elmansouri, Mohamed A. [1 ]
Boskovic, Ljubodrag B. [1 ]
Ignatenko, Maxim [1 ,3 ]
Filipovic, Dejan S. [1 ]
机构：
[1] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA
[2] Oculus, Menlo Pk, CA 94025 USA
[3] Custom Microwave Inc, Longmont, CO 80501 USA
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2020年 / 68卷 / 04期
关键词：
Antenna feeds; Reflector antennas; Couplings; Cavity resonators; Receiving antennas; Coaxial cavity antenna; in-band full duplex; isolation; reflector antenna; simultaneous transmit and receive (STAR); CIRCULATOR;
D O I：
10.1109/TAP.2019.2955143
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A dual polarized quasi-monostatic simultaneous transmit and receive (STAR) antenna system operating over 2:1 bandwidth with high isolation, co-polarized transmitting (TX)/receiving (RX) radiation, and high TX gain is proposed. The TX antenna is apex matched parabolic reflector illuminated by a coaxial cavity feed. The RX antenna is also coaxial cavity and mounted back-to-back with the TX feed. Thus, the configuration is termed quasi-monostatic. High front-to-back (F/B) ratio of the RX and TX feed antennas and the separation between them ensures high isolation. The fabricated system achieves 61 dB (average) isolation for CP and >38.5 dB for linearly copolarized TX and RX antennas. Moreover, the amplitude and phase imbalances in beam forming network (BFN) have lesser impact than the BFN-based STAR antenna systems. The antenna system operates from 4 to 8 GHz with VSWR <1.8, gain >7 dBic, and >20 dBic for the RX and TX, respectively. Additional techniques to further improve isolation are outlined.
引用
收藏
页码：2630 / 2637
页数：8
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