Single-Port Reconfigurable Magneto-Electric Dipole Antenna With Quad-Polarization Diversity

Micro & Optical Tech Letters

2019

A circularly polarized antenna is realized using a discontinuous ring dipole. With the introduction of p‐i‐n diodes, it has been possible to achieve polarization reconfigurability in the antenna. The antenna is fed by a tapered feed line, which also acts as a balun and biasing structure. The sense of rotation of the electric field vector (left‐hand or right‐hand) can be controlled by switching the states of the diodes. An equivalent circuit of the antenna is proposed, which has been used to compute the input reflection coefficient of the antenna. The performance of the antenna is verified by comparing the simulated results with the measured results. It has been observed that the antenna has 8.56% overlapping CP bandwidth (a common bandwidth for |S11| ≤ −10 dB and axial ratio, AR ≤3 dB) from 5.03to 5.48 GHz. A measured gain of 3.61 dBic is obtained for all polarization states. The proposed antenna can be used for the 5.2 GHz Wi‐Fi application.

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A polarization reconfigurable discontinuous ring dipole antenna

Micro & Optical Tech Letters

2019

“…Various techniques have been proposed to realize polarization reconfigurable antennas. Some of those are, reconfiguring either the radiating element or the ground plane or using a switchable feed network …”

Section: Introductionmentioning

confidence: 99%

“…More recently, in, a square patch is excited by a reconfigurable cross probe feed. A magneto‐electric dipole utilizing reconfigurable feed is studied for circular polarization reconfigurability. The integration of RF switching elements within the feeding network or radiating elements results in the reduction in the antenna gain and the radiation efficiency .…”

Section: Introductionmentioning

confidence: 99%

A polarization reconfigurable CPW fed monopole antenna with L-shaped parasitic element

Int J RF Microw Comput Aided Eng

2018

A coplanar waveguide fed polarization reconfigurable monopole antenna is proposed in this letter. The proposed antenna consists of L‐shaped stubs placed on either side of a monopole, two p‐i‐n diodes and a slot in the ground plane. In the proposed antenna structure, the switching element is not directly connected to the feed line. Depending on the switching state of the p‐i‐n diodes, the antenna either radiates left/right circular polarization or linear polarization. To validate the proposed design, the antenna was fabricated and its performance was measured. Since the ground plane is electrically small, the effect of the cable and SMA connector on the performance of the antenna is also investigated. The measured impedance bandwidth is 66.78% (3.67 GHz to 7.35 GHz) and the axial ratio bandwidth is 13.62% (4.24‐4.86 GHz) for circular polarization and 23.61% (3.81‐4.83 GHz) impedance bandwidth for linear polarization.

A wideband polarization reconfigurable isosceles trapezoidal monopole antenna

Int J RF Microw Comput Aided Eng

2018

In this article, a polarization reconfigurable isosceles trapezoidal monopole antenna for the circular polarization (CP) is presented. A trapezoidal monopole and the ground plane are on the same side of the dielectric substrate. The monopole is excited by a reconfigurable T‐shaped 50 Ω microstrip feed line and reconfigurable vertical slots are incorporated in the ground plane to realize switchable wideband CP. For the different switching states of the p‐i‐n diodes, linear polarization, left‐handed and right handed CP can be achieved in the boresight direction (+z direction). The antenna prototype is fabricated and tested. The measured reflection coefficient bandwidth (|S11| < −10 dB) is 31.2% (2.13 ‐ 2.91 GHz) and axial ratio bandwidth (axial ratio < 3 dB) is 22% (2.18 ‐ 2.72 GHz) for the CP. The measured reflection coefficient bandwidth is 18.56% (2.15 ‐ 2.59 GHz) for linear polarization.