Abstract
This letter proposes a simple compact microstrip antenna with enhanced bandwidth. The antenna is composed of three narrow rectangular patches: one middle patch and two side patches. The side patches are staggered longitudinally with respect to the middle patch and connected using short strips. The antenna is printed on a thin single-layer dielectric substrate with a ground plane and fed by a coaxial probe at the center of the middle patch. By staggering the side patches with respect to the middle patch, two resonant modes are excited at two close frequencies and a wide bandwidth is obtained. The antenna has a compact size of 0.31λ0 × 0.29λ0 × 0.027λ0 (where λ0 is the center operating wavelength in the free space) and a measured impedance bandwidth of 6.8% (return loss > 10 dB), which is approximately 2.3 times wider than that of a conventional square microstrip antenna on the same substrate. The antenna has a stable gain varying from 5.8 to 7.5 dBi and a low cross-polarization level less than -15 dB within the impedance bandwidth. The radiation characteristics are nearly constant over the entire impedance bandwidth.
| Original language | English |
|---|---|
| Article number | 9186296 |
| Pages (from-to) | 2038-2042 |
| Number of pages | 5 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 19 |
| Issue number | 12 |
| DOIs | |
| State | Published - 2020.12 |
Keywords
- Bandwidth enhancement
- compact size
- microstrip antenna (MSA)
- simple structure
Quacquarelli Symonds(QS) Subject Topics
- Engineering - Electrical & Electronic
- Engineering - Petroleum
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