Compact Microstrip Patch Filtenna Array Based on Reusable High-Order SIW Cavity

In this letter, a compact circularly polarized (CP) microstrip patch filtenna designed by reusing dual‐mode substrate integrated waveguide (SIW) cavity is proposed. The dual‐mode SIW cavity, operating at its TE120 and TE210 modes, can be used not only as the first stage resonator of the filtering network but also feeds the four microstrip patches working at their TM10 and TM01 modes. A pair of asymmetric perturbed posts is inserted in the SIW cavity to perturb the electric field distributions of TE120 and TE210 modes so as to achieve one axial ratio (AR) minima. The other AR minima is realized by sequentially exciting the four orthogonal microstrip patches via the four rectangular slots that are etched on the top surface of the SIW cavity. In addition, four metal posts penetrated the SIW cavity is employed to improve the impedance matching. For verification, a CP filtenna prototype centered at 5.13 GHz is designed, manufactured, and tested. The measured results agree well with the simulated ones, demonstrating a fractional impedance bandwidth of 6.9% (4.95–5.3 GHz), a 3 dB AR bandwidth of 4.2% (5–5.21 GHz), and a maximum boresight realized gain of 8.4 dBic.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A compact circularly polarized microstrip patch filtenna based on reusable dual‐mode substrate integrated waveguide cavity

Dong

Yuan

et al. 2023

“…Various types of filtennas, especially mmWave filtennas, have been reported, 10–30 which were implemented with frequency‐selective surface cover (or radome), substrate integrated waveguide (SIW) cavities, dielectric resonators, impedance stepped resonators, and so forth. In Hu et al, 13 a traveling‐wave antenna with diverse split‐ring resonators (SRRs) is proposed and broad‐coupled complementary SRR is used to improve the high‐frequency stopband characteristic.…”

Section: Introductionmentioning

confidence: 99%

Millimeter‐wave filtenna for 5G application with multiple controllable radiation nulls and wide stopband

Li,

Zhu,

et al. 2023

A filtenna (filtering antenna) for the fifth generation (5G) mobile communications in millimeter‐wave (mmWave) band is proposed in this paper. The filtenna is fed by a probe, and two radiation nulls are generated at the upper sideband based on the stacked‐patches structure. Then, two shorting pins loaded on the driven patch are introduced, which then result in the third radiation null. An “X‐character” shape radiation loop is added therefore, the fourth radiation null can be generated. Besides, the fifth radiation null at around 34 GHz is generated by adding four parasitic strips on the top radiation patch. The measured −10 dB impedance bandwidth of the filtenna is from 23.07 to 30.99 GHz. The average gain of the antenna is larger than 5.5 dBi, and the stopband suppression can reach 14 dB with a wide stopband. With the merits of low profile, wide stopband, and stable radiation, the proposed filtenna can be a good candidate for 5G mmWave applications.

A low SLL series‐fed patch array antenna using simple and compact ridge waveguide‐based unequal feeding network

Chen,

Farahbakhsh,

et al. 2024

In this paper, the design of a low sidelobe level (SLL) 10 × 10‐element series‐fed patch antenna array is presented. A ridge waveguide‐based nonuniform feeding layer is employed to excite the array. Each column of the antenna array includes a tapered 10‐element series fed patch antenna array. By using a simple and compact center‐fed ridge waveguide, a low loss feeding layer is achieved. The coupling between the ridge waveguide and the standard WR‐75 flange is performed by employing a proposed stepped transition. The measured results indicate that the maximum gain is 24.1 dBi and the SLL is lower than −20 dB in both H‐ and E‐planes at 12.7 GHz. The proposed low SLL planar series‐fed patch antenna array can be utilized as an acceptable candidate for radar applications.