A Compact Filtering Microstrip Antenna With Quasi-Elliptic Broadside Antenna Gain Response

Lin, Chin-Kai; Chung, Shyh‐Jong

doi:10.1109/lawp.2011.2147750

Cited by 180 publications

(9 citation statements)

References 4 publications

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“…To obtain a good matching between the filters and antennas, the conventional method [3,4,5,6] optimized the last coupled line section to make the input admittance of the filter equal to the filtering antenna at the center operating frequency. In order to match the antenna over a wide band, the last two coupled line sections of the filter are considered and optimized together in this work.…”

Section: Synthesis Methodsmentioning

confidence: 99%

“…Another approach is based on the synthesis technique of the filter. In [3,4,5,6,7,8,9,10,11,12], the filtering antennas were fabricated with the antenna regarded as the last resonator of the filter, which can reduce the size and realize a direct impedance matching. A kind of wideband circularly polarized filtering antennas were demonstrated with the good in-band responses and flat gains [13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Synthesis Methodsmentioning

confidence: 99%

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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show abstract

“…Thus, the fusion design of the antenna and filter is favored by filter antenna researchers. So far, many types of filtering antennas have been studied to prove the superiority of fusion design, such as embedded patch antennas [4], slotted cavity antennas [5][6], horn antennas [7], and so on.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Broadband Filtering Dielectric Resonator Antenna Based on SISL With the Improvement of Suppression Level

Yan,

Wang,

Luo

et al. 2024

IEEE Open J. Antennas Propag.

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To achieve a low-profile, wide-bandwidth, and highly selective design, this paper presents a substrate integrated suspended line (SISL) based broadband filtering dielectric resonator antenna (DRA) with the improvement of suppression level. The dielectric resonator is cylindrical and fed from the bottom by a microstrip-coupled slot. The dual head structure with the designed open stub can provide two radiation nulls on both sides of the passband for the filtering function and can excite three resonant modes (HEM11δ, HEM11δ, and TE131 mode) at different resonant frequencies to enlarge the impedance bandwidth of the proposed antenna. Then, adding a metal branch perpendicular to the feeder can offer a radiation null to eliminate the undesired resonances in the right stopband. Finally, the suppression level at high frequency is improved further by filling Sub2's cavity with FR4. A prototype has been manufactured and measured for demonstration. Measurement shows that the proposed antenna has a -10-dB impedance bandwidth of 32.9% (2.98-4.15 GHz), a flat gain within the passband, and the gain suppression level within the stopband exceeds 15.5 dB.INDEX TERMS Dielectric resonator antenna (DRA), filtering antenna, improvement of suppression level, substrate integrated suspended line (SISL), wideband.

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“…In addition, some resonators have been used to design filtering antennas, e.g. hairpins [10,11], stub resonators [8,12], U-resonators [13,14], ring resonators [15], and interdigital resonators [3,16]. The co-design of an antenna and a filter able to produce a miniaturized front-end device with selectivity is based on the filter design.…”

Section: Introductionmentioning

confidence: 99%

Selectivity improvement of interdigital filtering-antenna using different orders for 5 G application

Cahyasiwi

Roza

Mujirudin

et al. 2022

Int. J. Microw. Wireless Technol.

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In this paper, filter and antenna integration is studied to produce a compact device for wireless front-end equipment. Filtering antennas are advanced due to their selectivity performance, represented by a flat gain response. Two filtering antennas are proposed to improve the selectivity using different orders. The first antenna is based on second-order filter and the other on third-order filter. Both antennas are designed to operate at 4.65 GHz for mid-band 5 G application with a bandwidth of 6.45%. The first antenna integrates a rectangular radiator and an interdigital resonator based on second-order filter. It obtained a bandwidth impedance of −10 dB for 300 MHz and a maximum gain of 6.48 dBi. Meanwhile, the second design consists of a rectangular radiator and two interdigital resonators based on third-order filter as the feedline. Having the same bandwidth as the first design, the second design achieved a flat gain of 6.37 dBi in the operational bandwidth. The second antenna design showed better selectivity with sharper gain than the first design. The two antennas were fabricated and measured for validation. The simulation and measurement results showed good agreement.

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A Compact Filtering Microstrip Antenna With Quasi-Elliptic Broadside Antenna Gain Response

Cited by 180 publications

References 4 publications

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

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

A Low-Profile Broadband Filtering Dielectric Resonator Antenna Based on SISL With the Improvement of Suppression Level

Selectivity improvement of interdigital filtering-antenna using different orders for 5 G application

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