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IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 12, December 2000

Table of Contents for this issue

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An L -Band High-Efficiency and Low-Distortion Power Amplifier Using HPF/LPF Combined Interstage Matching Circuit

Kazutomi Mori, Member, IEEE Shintaro Shinjo, Member, IEEE Fumimasa Kitabayashi, Akira Ohta, Member, IEEE Yukio Ikeda, Member, IEEE and Osami Ishida Senior Member, IEEE

Page 2560.

Abstract:

An L-band high-efficiency and low-distortion power amplifier using a high-pass filter/low-pass filter (HPF/LPF) combined interstage matching circuit is presented in this paper. An HPF/LPF combined interstage matching circuit can realize both the optimum load impedance of the driver-stage FET and the optimum source impedance of the final-stage FET to achieve high efficiency with a specified distortion. The circuit has been utilized in a three-stage high-power-amplifier module, size of which is 0.08 cm3 (7 mm × 7 mm × 1.7 mm). The amplifier achieves a power-added efficiency of 43.9% and an output power (Pout) of 27.1 dBm with an adjacent channel leakage power of -38 dBc at 1.95 GHz for wide-band code-division multiple-access cellular phones.

References

  1. T. Nishimura, N. Iwata, K. Yamaguchi, K. Takemura and Y. Miyasaka, "3.5 V operation driver-amplifier MMIC. Utilizing SrTiO3 capacitors for 1.95 GHz wide-band CDMA cellular phones", in IEEE MTT-S Int. Microwave Symp. Dig., 1998, pp.  447-450. 
  2. T. Nishimura, N. Iwata and G. Hau, "Wide-band CDMA highly-efficient heterojunction FET over wide range output power with DC-DC converter", in IEEE MTT-S Int. Microwave Symp. Dig., 1999, pp.  1091-1094. 
  3. N. Miyazawa, H. Itoh, Y. Nakasha, T. Iwai, T. Miyashita, S. Ohara and K. Joshin, "0.2 cc HBT power amplifier module with 40% power-added efficiency for 1.95 GHz wide-band CDMA cellular phones", in IEEE MTT-S Int. Microwave Symp. Dig., 1999, pp.  1099-1102. 
  4. M. Nakayama, T. Umemoto, Y. Itoh and T. Takagi, "1.9 GHz high-efficiency linear MMIC amplifier", in 1994 Asia-Pacific Microwave Symp. Dig.,, pp.  347-350. 
  5. H. Yamada, S. Ohara, T. Iwai, Y. Yamaguchi, K. Imanishi and K. Joshin, "Self-linearizing technique for L -band HBT power amplifier: Effect of source impedance on phase distortion", in IEEE Trans. Microwave Theory Tech., vol. 44, Dec. 1996, pp.  2398-2402. 
  6. T. Takagi, et al. "Design method of high efficiency UHF band monolithic multistage FET amplifier using harmonic terminating technique", in IEICE Trans. Electron., vol. J76-C-1, Nov. 1993, pp.  389-398. 
  7. M. Maeda, H. Masato, H. Takehara, M. Nakamura and S. M. Ishikawa, "Source second-harmonic control for high efficiency power amplifiers", in IEEE Trans. Microwave Theory Tech., vol. 43, Dec. 1996, pp.  2952-2957. 
  8. K. Mori, Y. Itoh, K. Komuro and T. Takagi, "A calculation method of large-signal characteristics of multi-stage power amplifier modules using source-pull and load-pull data", in IEICE Trans. Electron., vol. E81-C, June 1998, pp.  904-910. 
  9. T. Iwai, S. Ohara, T. Miyashita and K. Joshin, "63.2% high efficiency and high linearity two-stage InGaP/GaAs HBT power amplifier for personal digital cellular phone system", in IEEE MTT-S Int. Microwave Symp. Dig., 1998, pp.  435-438. 
  10. Y. Ikeda, K. Mori, D. Ichiyama, H. Katayama, A. Inoue, N. Tanino, T. Ogata and T. Takagi, "A 900 MHz band 0.1 cc amplifier module having high efficiency and low distortion characteristics", in Asia-Pacific Microwave Conf. Dig., 1998, pp.  1167- 1170.