Design of a Electrically Tunable Filter for RF Front-end Circuitry of the Microwave Receiver
- DOI
- 10.2991/meic-15.2015.74How to use a DOI?
- Keywords
- microwave; electrically tunable filter; variable capacitance diode; quality factor; insertion loss
- Abstract
The electrically tunable filter for the RF front-end circuitry of the microwave receiver is designed to the performance with low insertion loss, low volatility band, high signal selection and superior adjacent channel interference. This paper presents a design scheme of a 225 to 500 MHz electrically tunable filter. The design uses the capacitive coupled double tuned resonant circuit than can make the signal has a higher selectivity at the resonant frequency and the varactor-BBl78 is chosen in order to achieve tuning characteristics of the electrical filter. Based on the principle of power transfer filter and variable capacitance diode characteristics, a theoretical analysis was made for the influence to the important indexes of the frequency Variation to the electric adjustable filter insertion loss and rectangle coefficient. The circuit design is optimized simulation by Professional simulation software ADS and the filter waveform at different resonant frequencies was received. Designed by the program, the filter's 3dB bandwidth is greater than 10MHz, stop-band attenuation is greater than 30dB, insertion loss is less than 7dB, standing wave ratio (VSWR) is less than 1.5, can effectively improve the signal to noise ratio of the receiver, and can solve the problem of interference and electromagnetic compatibility when multiple radio equipment work at the same time.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Qing-ping Wu AU - Kai Shen AU - Hui-min Zhang AU - Yu-feng Zhou PY - 2015/04 DA - 2015/04 TI - Design of a Electrically Tunable Filter for RF Front-end Circuitry of the Microwave Receiver BT - Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering PB - Atlantis Press SP - 315 EP - 318 SN - 2352-5401 UR - https://doi.org/10.2991/meic-15.2015.74 DO - 10.2991/meic-15.2015.74 ID - Wu2015/04 ER -