Low-Profile Wideband Microstrip Antenna Based on Multiple Modes With Partial Apertures

In this letter, a low-profile microstrip antenna is presented for wideband requirement for both −10 dB | S 11 | and 3 dB gain bandwidth. Multiple modes with partial apertures are introduced to broaden the bandwidth within a relatively low profile. The working mechanism of the proposed antenna is ana...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2019-07, Vol.18 (7), p.1372-1376
Main Authors: An, Wenxing, Li, Shenrong, Sun, Wangyu, Li, Yue
Format: Article
Language:English
Subjects:
Antenna measurements
Antennas
Apertures
Bandwidths
Broadband
Broadband antennas
Frequencies
Low-profile wideband antennas
Microstrip antennas
multiple modes
periodically slot-loaded structures
Wideband
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Summary:In this letter, a low-profile microstrip antenna is presented for wideband requirement for both −10 dB | S 11 | and 3 dB gain bandwidth. Multiple modes with partial apertures are introduced to broaden the bandwidth within a relatively low profile. The working mechanism of the proposed antenna is analyzed, and the designed antenna has an impedance bandwidth of 57.3% (from 2.94 to 5.3 GHz), covering the frequency bands of fifth generation between 3 and 5 GHz with dimensions of 1.29 λ 0 × 1.01 λ 0 × 0.044 λ 0 , where λ 0 is the free-space wavelength of 4 GHz. The antenna prototype is fabricated, and the measured results are in good agreement with the simulation ones. The measured average gain is 5.26 dBi, and the radiation patterns remain stable in the target band with low cross-polarization levels at both principle planes.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2019.2917077