A Broadband Filtering Duplex Patch Antenna With High Isolation

Lin, Xian‐Jing; Xie, Ze‐Ming; Zhang, Pei-Sheng; Zhang, Yao

doi:10.1109/lawp.2017.2689324

Cited by 47 publications

(19 citation statements)

References 12 publications

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“…With the development of the fifth‐generation (5G) mobile and wireless communication technologies, antennas play an important role in modern wireless communication systems. As an important component of radio frequency (RF) front end, filtering antennas have attracted more and more attention in recent years …”

Section: Introductionmentioning

confidence: 99%

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A novel differential filtering patch antenna with high selectivity

Wang

Ran

Hu³

et al. 2019

Int J RF Microw Comput Aided Eng

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A novel differential filtering antenna with high selectivity is proposed. The antenna is mainly composed of three different‐size patches, a slot, a pair of differential feeding lines, and a line resonator. An air gap is adopted to improve the impedance bandwidth and the filtering performance. The line resonator helps to generate high common‐mode (CM) rejection. Owing to the parasitic concave and convex patches, the filtering performance and the bandwidth of the antenna are enhanced. The parasitic concave patch affects the lower band‐edge selectivity while the parasitic convex patch influences the upper band‐edge selectivity. In addition, the frequencies of two radiation nulls can be controlled independently to achieve two high sharp roll‐off rates by adjusting the lengths of the parasitic patches. Considerable impedance matching bandwidth is achieved through an aperture coupling. Finally, a prototype of the differential filtering antenna is fabricated and tested. The measured results are in good agreement with the simulated results, showing an impedance bandwidth of 9.9% and an average realized gain of 7.5 dBi. Besides, two filter zero transmissions located at 3.40 and 3.84 GHz produced two radiation nulls.

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Section: Introductionmentioning

confidence: 99%

“…As an important component of radio frequency (RF) front end, filtering antennas have attracted more and more attention in recent years. [1][2][3][4][5][6][7][8][9][10][11][12][13] Recently, some methods of designing filtering antennas are employed. The relatively simple method is to integrate extra filtering circuits into antenna.…”

Section: Introductionmentioning

confidence: 99%

A novel differential filtering patch antenna with high selectivity

Wang

Ran

Hu³

et al. 2019

Int J RF Microw Comput Aided Eng

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show abstract

“…For example, shorting vias, stacked patch and U-slot are applied for filtering function. The diplexer which consists of two channel filters can be also integrated with antennas [26,27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

Design of a wideband parallel-coupled filtering antenna based on dual-frequency matching condition

Dong

Sun

2019

IEICE Electron. Express

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In this paper, a wideband filtering antenna is designed based on the dual-frequency matching condition. Instead of matching at only one radiating frequency in the conventional filtering antenna design, an antenna element with two radiating frequencies are considered and equivalently modeled as two series-connected parallel RLC resonators, a series inductor, as well as a shunt capacitance. To obtain a wideband impedance matching, last two stages of the parallel coupled-line sections in a filter are synthesized for matching the antenna at two frequencies. Finally, a prototype of a four-pole filtering antenna is designed and fabricated. The measured results achieve a wide bandwidth of 27.8% over 2.12-2.81 GHz with a flat antenna gain of 3.41 dBi over all the filtering band.

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“…These can be realized by two cascaded triplet sections of quarter wavelength resonators [1], by coupling electromagnetic (EM) waves through dog-bone-shape slotted ground [2], or by microstrip-to-slot transition technique [3], to name just a few. T-shaped probes presented in [4] acted as a two-pole band-pass filter (BPF) in a duplex patch antenna, whereas two H-shaped feed-lines aided in achieving a quasi-elliptic BPF in [5]. Tuneable capacitors were also used to control the resonating frequencies of two planar inverted-F antennas (PIFAs), resulting in tuneable duplexing antenna transceivers [6].…”

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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A Broadband Filtering Duplex Patch Antenna With High Isolation

Cited by 47 publications

References 12 publications

A novel differential filtering patch antenna with high selectivity

A novel differential filtering patch antenna with high selectivity

Design of a wideband parallel-coupled filtering antenna based on dual-frequency matching condition

A Ku-Band Filtering Duplex Antenna for Satellite Communications

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