The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

The Design of Ultra-broadband Power Amplifier using a Negative Feedback

부궤환을 이용한 광대역 전력증폭기 설계

  • Published : 2009.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this dissertation ultra-broadband power amplifier(UPA) was designed and fabricated using negative feedback technique. UPA was made of pre-amplifier, drive amplifier and power amplifier. Negative feedback technique was used to achieve ultra-broadband performance. Designed power amplifier has 30dB gain and 2W output power. The load-pull data of power amplifier for optimal power matching was extracted from the measured S-parameter. Fabricated PCB material, permittivity is 4.6 and thickness is 0.8mm, is FR4 and UPA was fabricated 3 modules for comparison of the simulated and measured results. Size of the fabricated pre-amplifier and drive amplifier module is 40mm'50mm'16mm. And from the experimental results, gain of the pre-amplifier module is 9.87dB at 2GHz and flatness is 0.63dB. Experimental result of the drive amplifier module is 10.97dB at 2GHz and flatness of that is 0.26dB. Test result of the power amplifier module is 10.71dB at 2GHz and flatness is 0.72dB. Total size of the power amplifier is 45mm'134mm'16mm. According to the test results, gain of the UPA is 28.98dB at 2GHz and flatness is 1.68dB. Output power was 32.098dBm at 2GHz, 32.154dBm at 1GHz and 31.273dBm at 100MHz.

Keywords

References

  1. 김한석, ‘1.8GHz 대역의 전치왜곡 선형화기를 이용한 전방궤환 선형 전력 증록기의 설계에 관한 연구’, 건국대학교 박사학위 논문, 2000
  2. iTerra Communications, 'A 10MHz to 22GHz MMIC Amplifier with 1W Output,' Microwave Journal, 2004
  3. A. S. Virdee and B.S Virdee, 'Computer-aided design of ultra-broadband 100M Hz to 20GHz amplifiers,' Microwave Journal, 2000
  4. B. J Minnis, 'The traveling wave matching technique for cascadable MMIC amplifier,' IEEE Transactionson Microwave Theoryand Techniques, MTT-40, pp.690-692, 1994 https://doi.org/10.1109/22.285081
  5. M. Berroth and R. Bosch, 'Broadband determination of the FET small signal equivalent circuits,' IEEE Transactionson Microwave Theoryand Techniques, MTT-40, p.891, July 1994
  6. P. B. Kennington, High-Linearity RF Amplifier Design, Artech House Inc., 2000
  7. G. Gonzalez, Microwave Transistor Amplifiers Analysis and Design, Prentice-Hall, 1997
  8. M. Albulet, RF Power Amplifiers, Noble publishing, 2001
  9. Han-Young Lee 'A Study on Design of Optimal Load Impedance for Broadband Characteristic Improvement of the Power Amplifier', Trans. KIEE. Vol. 58, No.6, pp. 1166-1173, JUN, 2009