다이오드를 이용한 가변 감쇠기의 설계 및 제작에 관한 연구
A Study on the Fabrication of Variable Attenuator using a Diode
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초록
This paper has been fabricated the two different type of variable attenuators using a characteristics of a 3 dB directional coupler and pin diodes. One was not analyzed using the conventional even-odd modes but used simple two-port techniques. The resulting scattering parameters described operation characteristics for the general case where the terminating impedances are equal and unequal. After analyzing resistor role of the π type fixed attenuator, this paper used a pin diode instead of a resistor,The variable attenuators were fabricated using pin diodes for current-controlled attenuation on the coupled ports of a 3 dB branch-line coupler and π type fixed attenuator. The realized variable attenuators have more than 33 dB attenuation ranges at 2.1 GHz, and the input and output reflection coefficients are less than -13 dB. These results could be applied to mobile communication systems. It can be varied gain of the power amplifier according to change a outdoor environmental temperature and improved linearity.
Abstract
This paper has been fabricated the two different type of variable attenuators using a characteristics of a 3 dB directional coupler and pin diodes. One was not analyzed using the conventional even-odd modes but used simple two-port techniques. The resulting scattering parameters described operation characteristics for the general case where the terminating impedances are equal and unequal. After analyzing resistor role of the π type fixed attenuator, this paper used a pin diode instead of a resistor,The variable attenuators were fabricated using pin diodes for current-controlled attenuation on the coupled ports of a 3 dB branch-line coupler and π type fixed attenuator. The realized variable attenuators have more than 33 dB attenuation ranges at 2.1 GHz, and the input and output reflection coefficients are less than -13 dB. These results could be applied to mobile communication systems. It can be varied gain of the power amplifier according to change a outdoor environmental temperature and improved linearity.
참고문헌 (6)
- Behzad Razavi, "RF Microelectronics", pp.54~97 (1998), Prentice Hall PTR
- Stepan Lucyszyn, "Optically Induced Measurement Anomalies with Voltage-Tunable Analog-Control MMICs", 46(8), pp.1109~ (1998), IEEE Transactions on MTT
- Inder Bahl, "Microwave solid state circuit design", pp.667~670 (1988), wiley New York
- Robert E. Collin, "Foundation for Microwave Engineering", pp.432~ (1992), McGraw-Hill
- Stewart walker, "A low phase shift attenuator", Microwave Theory and Techniques, 42(2), pp.182~185 (1994), IEEE Trans.
- J. Reed, ""A Method of Analysis of Symmetrical Four-Port Network," IRE Trans. MTT-4, pp. 246~252, Oct., 1956.", ~ (1956)