A ring antenna for dual-sense circular polarization

Lertsakwimarn, Kittima; Phongcharoenpanich, Chuwong; Fukusako, Takeshi

doi:10.1109/compem.2016.7588607

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…Monopole antennas are also a common approach to achieve wideband CP antennas [9][10][11]. While using dual-feed or multiple substrates can usually enhance bandwidth [12][13][14], it is at the expense of more complicated fabrications, and therefore, higher cost. Single-feed slot antennas are simple to fabricate and have a low profile, but usually with a narrow bandwidth and low gain values for being bidirectional.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth enhancement of circularly polarised slot global navigation satellite systems antenna using an integrated filter‐antenna approach

Aly,

Wang

2024

IET Microwaves Antenna & Prop

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Abstract:A technique to enhance the bandwidth of a circularly polarised antenna using the filter‐antenna design approach is presented. The design relies on adding a resonator coupled to the radiation element—an L‐shaped slot antenna in the case of global navigation satellite systems. This change in the feeding structure broadens both the impedance and the axial ratio (AR) bandwidths and allows more design flexibility. Compared with a reference L‐shaped slot antenna with a conventional feed, the proposed antenna design achieves a doubling of the impedance matching bandwidth from 19% to 41% over the frequency range from 1.2 to 1.81 GHz and a wider AR bandwidth from 35% to 44.5% in the range from 1.17 to 1.84 GHz. The AR bandwidth covers the entire impedance bandwidth. The effect of a metal reflector on antenna performance is also investigated and discussed.

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Section: Introductionmentioning

confidence: 99%

Bandwidth enhancement of circularly polarised slot global navigation satellite systems antenna using an integrated filter‐antenna approach

Aly,

Wang

2024

IET Microwaves Antenna & Prop

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Broadband simultaneously RHCP-LHCP radiating microstrip fed rectangular slot antenna for polarization diversity applications

Reddy

Murugan

Kumar

2019

Int J RF Microw Comput Aided Eng

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In this article, for the first time, an antenna that can radiate LHCP and RHCP waves simultaneously is presented. The antenna enables simultaneous transmission of both right-handed (RH) and left-handed (LH) circular polarized (CP) waves separately over an elevation range from −45 to −5 and 5 to 45 from the zenith. The simultaneous radiation of dual sense CP in the different spatial directions enables the antenna to act as polarization diversity transmitter. The mechanism of virtual sequential rotation of magnetic currents inside the different parts of the slot, excited with uniform phase fields results in dual CP generation. The uniform phase orthogonal fields are generated in the different parts of the slot essentially by exciting the full wavelength rectangular slot loaded with grounded stubs, symmetrically, with a shorted microstrip line. The final design of the slot antenna arrived with a rigorous parametric study on different dimensional parameters of slot and grounded stub. The measured impedance bandwidth of 22.5% centered around 7 GHz and axial ratio bandwidth of 19% is achieved. An overlapping bandwidth of 17% is achieved where both matching and AR are very good. The measured isolation between the RHCP and LHCP in the above-mentioned elevation ranges is maintained above 10 dB. The simulated and experimental results are matching very well. K E Y W O R D Saxial ratio, left-handed CP, magnetic currents, Mobile satellite communications, polarization diversity, rectangular slot, right-handed CP, simultaneous dual CP

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Simultaneously RHCP and LHCP Radiating Polarization Diversity C-Slot Antenna for Mobile Satellite Communications

Reddy

Murugan

Kumar

2019

IETE Journal of Research

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A ring antenna for dual-sense circular polarization

Cited by 5 publications

References 3 publications

Bandwidth enhancement of circularly polarised slot global navigation satellite systems antenna using an integrated filter‐antenna approach

Bandwidth enhancement of circularly polarised slot global navigation satellite systems antenna using an integrated filter‐antenna approach

Broadband simultaneously RHCP-LHCP radiating microstrip fed rectangular slot antenna for polarization diversity applications

Simultaneously RHCP and LHCP Radiating Polarization Diversity C-Slot Antenna for Mobile Satellite Communications

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