Integrated single-fed circularly-polarized patch antennas with high-Q cavity filters

Li, Tianjiao; Cheng, Hongsheng; Gong, Xun

doi:10.1109/aps.2014.6905263

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…Back-toback microstrip patch antennas acted as resonators as well as radiators when being coupled to a slotted ground plane in between [16,17]. Cavity resonators were also used to play the filter role [18]. Dual-band notches were introduced in [19], by adding a band stop filter at the feed-line.…”

Section: Introductionmentioning

confidence: 99%

A Ku-Band Filtering Duplex Antenna for Satellite Communications

Aly¹,

Mao²,

Gao³

et al. 2019

PIER M

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In this paper, a dual-polarisation shared-aperture duplex antenna is presented for satellite communications at the standard microwave Ku-band, based on the integrated filtering-antenna concept and co-design approach. The design relies on the use of resonators coupled to the radiating dual-band dual-polarisation antenna. The resonant patch antenna forms one pole of each channel filter, resulting in a third-order filter in the Rx channel and a second-order filter in the Tx channel. The Rx and Tx ports of the antenna take in horizontal and vertical linear polarisations, respectively. The integrated duplexer helps to increase the isolation between the ports and the selectivity of each channel. The integration between the filter and the antenna is achieved by electromagnetic coupling, without the need of external matching circuits. Thus it attains a compact footprint. The operation frequencies of the demonstrated duplex antenna are from 11 to 12.5 GHz (12.8%) for the downlink to the Rx port, and from 13 to 14.4 GHz (10.2%) for the uplink at the Tx port. High port-to-port isolation of over 40 dB is realized to reduce channel interference. Flat in-band average gains are achieved to be 7.8 and 8.3 dBi, for the low-and high-bands, respectively.

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Section: Introductionmentioning

confidence: 99%

A Ku-Band Filtering Duplex Antenna for Satellite Communications

Aly¹,

Mao²,

Gao³

et al. 2019

PIER M

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“…Cascading of a UWB filter and antenna resulting in a UWB filtenna is illustrated in [6]. The authors in [7] have designed a cavity backed circularly polarised patch antenna, which renders a second‐order filtering response. Circular patch antenna, fed by a coupled line filter is proposed in [8], functioning at 2.45 GHz.…”

Section: Introductionmentioning

confidence: 99%

Circularly polarised filtering dielectric resonator antenna for X‐band applications

Sahoo

Gupta

Parihar

2018

IET Microwaves, Antennas & Propagation

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A circularly polarised filtering dielectric resonator antenna is proposed. Left hand circularly polarised electromagnetic field is generated by virtue of a rectangular ring slot present on the ground plane of the dielectric laminate, beneath the dielectric resonator antenna, which is fed by a 50 Ω microstrip line. Additionally, a semi‐elliptical shape bandpass filter is incorporated in the feed line to produce high selectivity, flat gain and wide stopband. A detailed analysis of the filter and the antenna has been carried out. The design offers fractional bandwidth of 6.13% ranging from 7.9 to 8.4 GHz, gain around 5.3 dBic and 3 dB axial ratio bandwidth of 3.68%. The simulated radiation efficiency is >80% in the pass band. The proposed structure has been fabricated and the results are compared with the simulated values.

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