상세정보
학술지
An Active Module Using a Ferroelectric CPW Phase Shifter for a Ku-Band APAA System
Cited - time in 
Download 0 time
Share 
Download 0 time
Share
- 발행일
- 200606
- 출처
- Journal of the Korean Physical Society, v.48 no.6, pp.1637-1641
- ISSN
- 0374-4884
- 출판사
- 한국물리학회 (KPS)
- 협약과제
- 04MB5700, 위상 배열 시스템 제어용 강유전체 이상기 MMIC기술, 이수재
- 초록
- This paper presents the development of an active module using a ferroelectric coplanar waveguide (CPW) phase shifter for a Ku-band active phased array antenna (APAA). This active module performs roles such as amplifying an RF signal with low noise coming from an antenna and changing the phase of a received RF signal. This module is composed of a 3-stage low-noise amplifier (LNA), a high-voltage dc block with an RF choke (RFC), and a ferroelectric phase shifter, whose structure is a CPW transmission line based on a (Ba, Sr)TiO3 (BST) thin film. The ferroelectric BST thin film is deposited on an MgO substrate by using pulsed laser deposition. Both ends of the CPW are continuously tapered to obtain good impedance matching without degrading the phase tuning property of the ferroelectric CPW phase shifter. The active module using a ferroelectric CPW phase shifter attains a phase-controllable range of 360 while retaining a return loss of better than .15 dB at Ku-band. The measured gain of the active module increases from 2 dB to 16 dB corresponding to a change in the dc voltage from 0 to 150 V with a 3.6 dB maximum noise figure at 12 GHz.d
- KSP 제안 키워드
- Active Phased Array Antenna, BST thin film, CPW transmission line, Coplanar Waveguide Feeding(CPW), DC block, DC voltage, Ku-Band, Low noise, MgO substrate, Noise Figure(NF), Phase Shifter