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2025 , Vol. 30 >Issue 2: 220 - 226

DOI: https://doi.org/10.1007/s12204-023-2621-z

Engieering and Technology

Wideband Microstrip-to-Microstrip Vialess Vertical Transition Based on Multilayer Liquid Crystal Polymer Technology

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  • School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China

Accepted date: 2022-09-21

  Online published: 2025-03-21

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Abstract

A Ka-band wideband microstrip-to-microstrip (MS-to-MS) vialess vertical transition on slotline multimode  resonator (MMR) is presented. The proposed transition mainly consists of a slotline MMR on the common  ground plane, and two microstrip (MS) lines facing each other at the top and third layers in the four-layered liquid  crystal polymer (LCP) substrate. In order to improve the bandwidth of the proposed transition, a U-shaped  branch is added to the top- and third-layer MS lines, separately. The slotline MMR can be properly excited by  setting the position of the U-shaped branch line. As such, a three-pole wideband vertical transition is obtained,  which shows a good transmission performance over a wide frequency range of 29.27—39.95 GHz. The three-pole  wideband vertical transition based on multilayer LCP substrate is designed, fabricated, and measured. Test results  indicate that a wide frequency range of 26.84—36.26 GHz can be obtained with return loss better than −10 dB  and insertion loss less than −3dB.

Cite this article

LIU Weihong , GUAN Dongyang , HUANG Qian , CHEN Liuyang, ZHANG Menglin . Wideband Microstrip-to-Microstrip Vialess Vertical Transition Based on Multilayer Liquid Crystal Polymer Technology[J]. Journal of Shanghai Jiaotong University(Science), 2025 , 30(2) : 220 -226 . DOI: 10.1007/s12204-023-2621-z

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