Design of 5G SISL BPFs Using Differential Inductor-Based Resonators

Xu, Wei; Ma, Kaixue

doi:10.1109/ims19712.2021.9574951

Cited by 4 publications

(1 citation statement)

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“…Filters have been designed based on substrate integrated suspended line (SISL) platform 8 before, but almost all of them are used in lower frequency bands. [9][10][11] In this regard, we intend to design BPFs for high-frequency application. In addition, the material cost is a significant index.…”

Section: Introductionmentioning

confidence: 99%

FR‐4‐based Ka‐band SISL bandpass filters using folded half‐wavelength resonators

Yue

Wang

2022

Micro & Optical Tech Letters

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In this letter, bandpass filters (BPFs) with folded short‐circuited half‐wavelength (λ/2) resonators are proposed based on the substrate integrated suspended line (SISL) platform for satellite communications. Each λ/2 resonator is folded, to achieve an overlapping structure, which not only reduces the size, but more importantly, reduces the loss. In addition, air cavity, metal shielding wall, and substrate excavation method also dramatically reduce the loss in substrates. Note that professional material term (FR‐4) material is chosen for the design, therefore, it is low‐cost and more suitable for production application. Finally, a second‐order and a fourth‐order combline BPFs are fabricated and measured to verify the design method. The insertion loss of the second‐order and the fourth‐order filters are only 0.78 and 1.19 dB at the center frequency of 29.2 GHz, respectively. The presented SISL filters using FR‐4 material demonstrate the advantages of low‐loss, low‐cost, and self‐packaging.

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