A Low-loss Wideband Filtering Coupler with Patterned Substrate Integrated Suspended Line (SISL) Technology

Authors

  • Li Ma State Key Laboratory of Information Photonics and Optical Communications, School of Electronic Engineering Beijing University of Posts and Telecommunications, Beijing, 100876, China
  • Yongle Wu State Key Laboratory of Information Photonics and Optical Communications, School of Electronic Engineering Beijing University of Posts and Telecommunications, Beijing, 100876, China
  • Mingxing Li Department of Electronic Engineering, Beijing Key Laboratory of Work Safety Intelligent Monitoring Beijing University of Posts and Telecommunications, Beijing, 100876, China
  • Weimin Wang Department of Electronic Engineering, Beijing Key Laboratory of Work Safety Intelligent Monitoring Beijing University of Posts and Telecommunications, Beijing, 100876, China
  • Yuanan Liu Department of Electronic Engineering, Beijing Key Laboratory of Work Safety Intelligent Monitoring Beijing University of Posts and Telecommunications, Beijing, 100876, China

Keywords:

Filtering coupler, microwave components, patterned substrate, substrate integrated suspended line (SISL), wide band

Abstract

A wideband filter-integrated coupler has been presented using the substrate integrated suspended line structure with patterned substrate. This coupler is composed of a two-line coupled line, two variant coupled lines, and four three-line coupled lines at each port. The SISL structure is composed of five print circuit boards, connected together by metal via holes. There is a hollowed substrate between two air cavities to reduce the loss. For further explanation, two wideband filtering SISL couplers operating at different operating frequencies with equal/unequal power divisions are designed and simulated, of which a specific coupler working at 1.66 GHz with a relative bandwidth of about 52.56% is fabricated and measured. The experimental results agree well with the theoretical and simulation ones. This proposed coupler has many advantages such as selfpackaged, low loss, filter integration, arbitrary power division ratio, and inherent DC-block function.

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Published

2019-06-01

How to Cite

[1]
Li Ma, Yongle Wu, Mingxing Li, Weimin Wang, and Yuanan Liu, “A Low-loss Wideband Filtering Coupler with Patterned Substrate Integrated Suspended Line (SISL) Technology”, ACES Journal, vol. 34, no. 06, pp. 949–955, Jun. 2019.

Issue

2019: Vol 34 Iss 6

Section

General Submission