A Study on the Ultra Small Size 25 Watt High Power Amplifier for Satellite Mobile Communications System at L-Band

Jeon, Joong-Sung; Ye,  Byeong-Duck; Kim, Dong-Il

Journal of Navigation and Port Research 2002;26(1):22-27.
Published online March 31, 2002.

L-band 위성통신 시스템을 위한 극소형 25 Watt 고출력증폭기에 관한 연구

전중성, 예병덕, 김동일

A Study on the Ultra Small Size 25 Watt High Power Amplifier for Satellite Mobile Communications System at L-Band

Joong-Sung Jeon, Byeong-Duck Ye, Dong-Il Kim

Abstract

The 25 Watt hybrid MIC SSPA has been developed in the frequency rang from 1.6265 ㎓ to 1.6465 ㎓ for uplink of INMARSAT’s earth station. To simplify the fabrication process, the whole system is designed of two parts composed of a driving amplifier and a power amplifier. The Motorolas MRF-6401 is used for driving part, the Motorolas MRF-16006 and MRF-16030 is used the power amplifier. We reduced weight and volume of high power amplifier through arranging the bias circuits in the same housing. The realized SSPA has more than 30 ㏈ for gain within 20 ㎒ bandwidth, and the voltage standing wave ratios(VSWR) of input and output port are less than 1.7, respectively. The output power of 44 ㏈m is achieved at the 1 ㏈ gain compression point of 1.6365 ㎓. These results reveal a high power amplifier of 25 Watt which is the design target. The Proposed SSPA manufacture techniques in this paper can be applied to the implementation of high power amplifiers for some radars and SCPC.

Key Words: Amplifier;P1㏈;INMARSAT;SSPA