Abstract
This paper demonstrates a dual-band circularly polarized (CP) two-dimensional (2D) series-fed patch array antenna. The CP rotating sense in each band is opposite to each other, which makes them well-suited for the downlink and uplink in satellite applications. The antenna can be designed to achieve a very high gain with a simple feeding structure using spiral microsip line, which can be integrated on a single-layered substrate. A theoretical framework for this type of antennas has been developed, which facilitates an efficient and fast design procedure requiring minimal computational resource. A prototype has been fabricated and measured, showing operating bandwidths (overlapped 10-dB return loss, 3-dB gain, 3-dB axial ratio bandwidths) of about 7% and 5%, realized broadside gains of 21.5 and 22 dBic at 12 and 14 GHz bands, respectively. This is an outstanding performance considering that the antenna profile is only 0.03 free-space wavelength (at 12 GHz) and the ratio between two operating frequencies is very tight accounting to only 1.17.
Original language | English |
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Pages (from-to) | 343-352 |
Number of pages | 10 |
Journal | IEEE Open Journal of Antennas and Propagation |
Volume | 3 |
DOIs | |
Publication status | Published - 22 Mar 2022 |
Keywords
- Spirals
- Microstrip
- Microstrip antenna arrays
- Antenna feeds
- Dual band
- Couplings
- Microstrip antennas
- circular polarization
- high gain
- microstrip patch antenna
- Archimedean spiral
- satellite communications.
- leaky-wave antenna
- series-fed patch antenna
- Antenna array