지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김흥근
- 발행연도
- 2021
- 저작권
- 경북대학교 논문은 저작권에 의해 보호받습니다.
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(Abstract)
A S-band 2-kW amplifier integrated GaN high electron mobility transistors (HEMT)-based amplification module is implemented in military radar to replace the existing traveling-wave tube amplifier (TWTA). The proposed SSPA consists of a high-power amplification module consists of 8 amplification modules, drive amplification module, control module, and power supply device. In the proposed SSPA, the amplification module and the components are integrated into a small package to efficiently manage space constraints. The harmonic frequency of the SSPA was removed by using a harmonic filter built-on a printed circuit board (PCB), while a constant output was maintained in response to the duty change of the input signal. To obtain the optimal results, an automatic level controller was additionally designed. The proposed SSPA exhibited a maximum gain of 48 dB and an output power of 63-63.6 dBm at the frequency band of 3.1 to 3.5 GHz. It was confirmed that the automatic level control function maintains the output power constant around 63 dBm even with the input power fluctuation of 15-20 dBm. To further verify the reliability of the proposed system, a temperature test between a range of -40 ℃ (low temperature) to 55 ℃ (high temperature) was profiled, which revealed potential merits of the developed test criteria of MIL-STD-810. Thus, the proposed SSPA was confirmed to be superior to the conventional TWTA amplifier in terms of light weight, high power, high gain, high efficiency, safety function, low repair cost, and short repair time, which can be a feasible method for S-band 2-kW Military Radars.
A S-band 2-kW amplifier integrated GaN high electron mobility transistors (HEMT)-based amplification module is implemented in military radar to replace the existing traveling-wave tube amplifier (TWTA). The proposed SSPA consists of a high-power amplification module consists of 8 amplification modules, drive amplification module, control module, and power supply device. In the proposed SSPA, the amplification module and the components are integrated into a small package to efficiently manage space constraints. The harmonic frequency of the SSPA was removed by using a harmonic filter built-on a printed circuit board (PCB), while a constant output was maintained in response to the duty change of the input signal. To obtain the optimal results, an automatic level controller was additionally designed. The proposed SSPA exhibited a maximum gain of 48 dB and an output power of 63-63.6 dBm at the frequency band of 3.1 to 3.5 GHz. It was confirmed that the automatic level control function maintains the output power constant around 63 dBm even with the input power fluctuation of 15-20 dBm. To further verify the reliability of the proposed system, a temperature test between a range of -40 ℃ (low temperature) to 55 ℃ (high temperature) was profiled, which revealed potential merits of the developed test criteria of MIL-STD-810. Thus, the proposed SSPA was confirmed to be superior to the conventional TWTA amplifier in terms of light weight, high power, high gain, high efficiency, safety function, low repair cost, and short repair time, which can be a feasible method for S-band 2-kW Military Radars.
목차
1. 서 론 11.1 연구 배경 11.2 연구 내용 42. 전력 증폭기 이론 62.1 펄스 62.2 전력 증폭기 102.2.1 A급 전력 증폭기 112.2.2 B급 전력 증폭기 122.2.3 AB급 전력 증폭기 142.2.4 C급 전력 증폭기 152.3 질화갈륨 HEMT 특성 162.4 전력 결합기 192.4.1 이진 결합 방식 202.4.2 공간 결합 방식 222.4.3 결합 방식에 따른 효율 비교 262.5. 저온 동시 소성 세라믹 기술 312.5.1 인터커넥트의 응용 322.5.2 패키지의 응용 352.5.3 수동 부품의 집적화 응용 363. 반도체 전력 증폭기 효율 향상 방법 373.1 제안한 소형 내부 고조파 필터 373.2 제안한 자동 이득 제어 방법 473.3 제안한 외부 공기 흐름을 고려한 방열판 534. 제안한 군사 레이더용 S대역 2kW급 질화갈륨 HEMT 반도체 전력 증폭기 634.1 반도체 전력 증폭기 634.2 고출력 증폭부 654.2.1 고출력 증폭기 팔래트 674.2.2 저온 동시 소성 세라믹 커플러를 이용한 분배기 및 결합기 704.2.3 T-접합 구조를 이용한 분배기 및 결합기 764.2.4 결합 선로를 이용한 커플러 784.3 구동 증폭부 824.4 제어부 894.5 전원부 935. 제안한 반도체 전력 증폭기 성능측정 결과 955.1 반도체 전력 증폭기 성능시험 955.2 환경 신뢰성 시험 1035.3 전자파 신뢰성 시험 1056. 결 론 110참고문헌 113Abstract 119
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