ZTE Communications ›› 2018, Vol. 16 ›› Issue (1): 61-66.DOI: 10.3969/j.issn.1673-5188.2018.01.007

• Review • Previous Articles    

Overview of Co-Design Approach to RF Filter and Antenna

ZHANG Wenmei, CHEN Xinwei   

  1. Shanxi University, Taiyuan 030006, China
  • Received:2018-10-13 Online:2018-02-25 Published:2020-03-16
  • About author:ZHANG Wenmei (zhangwm@sxu.edu.cn) received the B.S. and M.S. degrees from Nanjing University of Science and Technology, China in 1992 and 1995, respectively, and the Ph.D. degree in electronic engineering from Shanghai Jiao Tong University, China in 2004. Now she is a professor of the College of Physics and Electronics, Shanxi University, China. Her research interests include microwave and millimeter-wave integrated circuits, EMC, and microstrip antennas.|CHEN Xinwei (chenxw@sxu.edu.cn) received the B.S. and Ph.D. degrees from Shanxi University, China in 2002 and 2013. Now he is an associate professor of the College of Physics and Electronics, Shanxi University. His research interest is microwave filters.
  • Supported by:
    This work was supported by the National Science Foundation of China under Grant(No. 61771295);the Natural Science Young Foundation of Shanxi Province under Grant(Nos. 2014021021-1);the Natural Science Young Foundation of Shanxi Province under Grant(Nos. 2015011042.)

Abstract:

The filter and antenna are two key components of the radio frequency (RF) front-end. When the antenna is directly connected with the filter, additional mismatch losses will be caused. Therefore, the antenna and filter are integrated into a single device to provide both filtering and radiating functions. In this way, many advantages, like low cost, light weight, small size and lower insertion loss can be obtained. In this paper, the co-design approaches of RF filter-antenna are reviewed. Based on the open literatures, the integrated approaches of filtering antenna can be classified into five main categories:1) Co-design by optimizing the interfacing impedance, 2) co-design according to the synthesis approach of filter, 3) co-design by embedding novel resonators within the feeding structures, 4) co-design by employing auxiliary physical structures, and 5) other methods. The RF filter-antenna system can improve the integration degree of RF front-end, reduce its size and cost, and optimize its performance.

Key words: filtering antenna, Co-design, RF front-end