상세정보
학술지
Phased Array Shaped-Beam Satellite Antenna With Boosted-Beam Control
- 발행일
- 201912
- 출처
- IEEE Transactions on Antennas and Propagation, v.67 no.12, pp.7633-7636
- ISSN
- 0018-926X
- 출판사
- IEEE
- 협약과제
- 19HR1400, [전문연구실] 위성탑재체 핵심원천기술 개발 , 장동필
- 초록
- This communication presents a beamforming shaped-beam satellite (SBS) antenna based on a phased array technique and a boosted-beam control. The presented SBS antenna is specifically designed to cover the whole regions of Korea including the southern and northern areas. The proposed SBS antenna consists of waveguide feed network, beamforming circuits, waveguide circular polarizers, 19 radiation elements, and a boosted-beam control panel with active component calibration for temperature variation. To maximize the flexible performance, boosted-beam mode is supported to meet the required high-power signal regardless of bad weather conditions. The adjustable effective isotropic radiated power (EIRP) range was around 6 dB and there are a total of 19 beamforming units each configured by drive amplifier, phase shifter, and attenuator. Also, one extra beamforming unit synchronized with the other 19 elements is integrated for active component calibration. Each beamforming element can control relative phase shift up to 360째 with 5째 step and relative amplitude variation up to 10 dB with 1 dB step as well. Also, each radiation element is configured by waveguide horn and the return losses were better than 25 dB at 21 GHz.
- KSP 제안 키워드
- Active components, Amplitude Variation, Feed network, High power, Phase Shifter, Phased array technique, Power Signal, Relative phase shift, Return loss(RL), Temperature variations, beam control