A Wideband Circularly Polarized Cross-Dipole Antenna
By Yejun He, Wei He, Hang Wong. IEEE Antennas and Wireless Propagation Letters, 2014
207 citations recorded by the source corpus.
This letter introduces a wideband circularly polarized (CP) cross-dipole antenna fabricated on a double-layered printed circuit board (PCB) substrate for 2.45-GHz ISM band wireless communications. Unlike conventional cross-dipole antennas, the proposed cross dipole is designed with wide open ends such that both impedance and axial-ratio (AR) bandwidths are enhanced. In addition, to excite the CP radiation effectively, a curved-delay line providing an orthogonal phase difference among the cross-dipole elements is attached at the corners of the sequentially rotated elements. By choosing a proper radius of the curved-delay line, a wide input impedance of the antenna can be realized. The antenna is center-fed by a 50- Ω coaxial cable and is placed above a square reflector to obtain a directional CP radiation pattern. With the advantage of centered feed, symmetric CP radiation patterns can be achieved across the entire operating bandwidth. Simulated and measured results confirm the proposed antenna produced good CP characteristics. An impedance bandwidth (for VSWR ≤ 2) of about 50.2% (1.99-3.22 GHz) and the 3-dB AR bandwidth of about 27% (2.30-2.9 GHz) around the center frequency of 2.45 GHz were measured. The antenna has an average CP gain of 6.2 dBic across the operating bandwidth and the maximum gain of 6.8 dBic at the center frequency. The size of antenna is 0.45λ×0.45λ×0.24λ.
Subfields: Aerospace Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/2c2074e26b9fa45c53c0894b58bb3f0532c5aa02
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In Aerospace Engineering
- Ikmo Park
- Son Xuat Ta
- Richard W. Ziolkowski
- A. Erentok
- Nader Engheta
- Fernando Lisboa Teixeira
- Fu‐Chiarng Chen
- Jiunn‐Nan Hwang
In Electrical and Electronic Engineering
Citations in the corpus
- A High-Efficiency Broadband Rectenna for Ambient Wireless Energy Harvesting (2015, background): “A cross dipole antenna is selected due to its dual-polarization and broad beam-width which are suitable for incoming waves with arbitrary polarization and different incident angles [30].”
- Broadband Circularly Polarized Patch Antenna With Parasitic Strips (2015, background): “Sequentially rotated strips are connected to the cross dipole in [12], and a 3-dB AR bandwidth of 23% (2.”
- Crossed Dipole Antennas: A review. (2015, background): “Recently, the wideband CP crossed dipole antennas with a single feed [58], [62] have received much attention.”