A low‐cost dual‐mode differentially‐fed patch antenna based on SISL platform with out‐of‐band suppression

A dual‐mode differentially‐fed patch antenna is proposed with out‐of‐band suppression based on substrate‐integrated suspended line (SISL) platform. Taking advantage of the air cavity in the SISL platform, the antenna is with two resonant modes for enhanced bandwidth. One mode is TM01 of the patch an...

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Bibliographic Details
Published in:Microwave and optical technology letters 2021-10, Vol.63 (10), p.2634-2639
Main Authors: Luo, Yu, Yin, Tianjie, Yan, Ningning, An, Wenxing, Ma, Kaixue
Format: Article
Language:English
Subjects:
Antennas
cavity
differentially‐fed
dual‐mode
low‐cost
Patch antennas
SISL platform
Substrates
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Summary:A dual‐mode differentially‐fed patch antenna is proposed with out‐of‐band suppression based on substrate‐integrated suspended line (SISL) platform. Taking advantage of the air cavity in the SISL platform, the antenna is with two resonant modes for enhanced bandwidth. One mode is TM01 of the patch and the other one is the TE102 mode of the air cavity. A radiation null is also introduced by the air cavity at the upper band and result in out‐of‐band suppression. To verify the proposed design, a prototype is fabricated and measured. Measurements agree well with the simulations. In the band of 4.73–4.98 GHz, the reflection coefficients are less than −10 dB, which is for the Sub 6 GHz band for the 5G communication. Besides, the efficiency of the antenna is 80% with the low‐cost substrate of FR4.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.32953