Half-Mode Cavity-Based Planar Filtering Antenna With Controllable Transmission Zeroes

Dhwaj, Kirti; Kovitz, Joshua M.; Tian, Haozhan; Jiang, Li Jun; Itoh, T.

doi:10.1109/lawp.2018.2818058

Cited by 67 publications

(31 citation statements)

References 7 publications

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“…It is worth mentioning that, in this paper, the mixed-coupling method is used to introduce one transmission zero at the upper or lower side of the passband, leading to an asymmetric filtering characteristic. Furthermore, the source-to-load coupling method in [3] may be used to generate two transmission zeros. Figure 9(a) shows the simulated and measured normalized radiation patterns of the filtering antenna I in the two orthogonal planes (E-and H-planes) at 30 GHz.…”

Section: Resultsmentioning

confidence: 99%

“…By integrating filtering circuits into conventional antennas, researchers developed the co-designed filtering antennas. Various filtering antennas have been realized by integrating additional or embedded filtering circuits to the antenna feeding networks [2][3][4][5][6][7][8]. A second-order filtering microstrip antenna with quasielliptic function antenna gain response was presented in [2].…”

Section: Introductionmentioning

confidence: 99%

“…By introducing two radiation nulls, a pair of steep skirt at passband edge was obtained. In [3], a half-mode substrate integrated waveguide (SIW) cavity resonator was used in conjunction with a conventional SIW cavity to obtain a single-layer two-pole filtering antenna design. By using a printed Jerusalem-cross radiator and a ring slot-coupled feed structure, a filtering antenna without extra filtering circuits was presented in [4], provides both good filtering and dual-polarized radiating performances.…”

Section: Introductionmentioning

confidence: 99%

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Design of Compact Vertically Stacked Siw End-Fire Filtering Antennas With Transmission Zeros

Hua¹,

Jin²,

Liu³

2019

PIER Letters

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This paper presents a new type of vertically stacked substrate integrated waveguide (SIW) filtering antenna. It is composed of an SIW bandpass filtering circuit and an antipodal linearly tapered slot antenna (ALTSA). The filtering circuit consists of two vertically stacked SIW cavity resonators which are coupled with each other by etching slot on the common metal layer. By introducing electric and magnetic mixed coupling structures, close-to-passband transmission zeros can be realized and flexibly adjustable. Due to the partially vertically stacked structure, the proposed filtering antenna also shows a compact physical size. For validation, two vertically stacked SIW filtering antennas operating at 30 GHz with transmission zero at the upper or lower side of the passband are designed, fabricated, and measured. Good agreement is observed between the measured and simulated results.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of Compact Vertically Stacked Siw End-Fire Filtering Antennas With Transmission Zeros

Hua¹,

Jin²,

Liu³

2019

PIER Letters

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“…The input admittance Y r is thus modeled by shunt capacitance C r and radiation conductance G r . The values of the components in circuit model can be extracted based on the theoretical equations and HFSS simulator tool [13]. The impedance bandwidth of the whole antenna is limited by the quality factor of each HMSIW cavity, which can be calculated from the circuit model.…”

Section: Design Proceduresmentioning

confidence: 99%

Development of a Circularly Polarized Hmsiw Antenna

Itoh¹

2019

PIER Letters

Self Cite

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A circularly polarized (CP) half-mode substrate integrated waveguide (HMSIW) cavitybacked antenna is developed by a novel design method in this paper. The single-fed antenna contains two coupled HMSIW cavities with orthogonal polarizations. Its design method evolves from filter synthesis procedure, which takes the advantage of equivalent circuit model to accelerate the optimization. The antenna radiates high-purity right handed CP waves with measured axial ratio (AR) of 0.33 dB at 3.55 GHz, while its gain and AR bandwidth are comparable to other CP SIW antennas. With the robust design method, the proposed antenna is competitive in practical applications. INTRODUCTIONAntenna with circular polarization (CP) plays an important role in modern wireless communications. It solves the problem of the polarization mismatch caused by the multipath interference and the wave propagation in ionosphere. CP antenna with microstrip technology has been well studied, and the design procedure is mature [1-3]. However, microstrip antennas suffer from high conduction loss, which makes them less competitive in the high-frequency domain.The substrate integrated waveguide (SIW) cavity-based CP antennas have low conduction loss and high gain, while maintaining the advantages of low profile, low cost, and easy integration with planar circuits [4][5][6][7][8]. However, generating pure CP waves in SIW cavities is not as straightforward as that in microstrip patches. The general solutions are either to design two standalone radiating elements [8], or to cut slots on top (or bottom) of the SIW cavity [4][5][6][7]. The first solution requires external feeding to provide the phase difference. For the second one, though widely used, the performance of the antennas is highly dependent on the shape, size, and location of the slots. Therefore, the design procedure typically involves heavy optimization in full-wave simulators, which takes a lot of time and computation.In this paper, a CP antenna with SIW technique is developed by a fast and robust design methodology. The antenna contains two coupled half-mode SIW (HMSIW) cavities. The even and odd eigen-modes are excited inside the structure, similar to the coupled-mode patch antenna [9][10][11]. The design method evolves from filtering theory, where the equivalent circuit model is optimized to realize the target operating frequency and bandwidth. The final structure is directly synthesized from the circuit model, avoiding the heavy optimization in full-wave simulator. The proposed antenna has very low axial ratio (AR) at target frequency while still maintaining decent gain and AR bandwidth. The design procedures, along with the results and discussions, are presented in the following sections. DESIGN METHOD AND THEORYThe schematic layout of the proposed antenna is shown in Fig. 1. Two identical HMSIW cavities have orthogonal polarization to each other. A gap on the center wall brings magnetic coupling between the

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“…For instance, in [13], a millimeterwave filtering antenna array has been proposed, where patch array is fed by an SIW four-way anti-phase filtering power divider. In [15] and [16], the single and dual-band antennas based on the SIW have been proposed. In fact, both of them can be considered as a combination of a slot SIW antenna and a traditional SIW single or dual-mode filter, which limits the overall size reduction.…”

Section: Introductionmentioning

confidence: 99%

Development of Low-Profile Filtering Antennas With Dual-Mode Cavities

Wang

Dong

2020

IEEE Open J. Antennas Propag.

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Two filtering antennas implemented on the dual-mode cavities are proposed, investigated and experimentally verified in this paper. They are developed based on the single-layer substrate integrated waveguide (SIW) technology. The rectangular SIW dual-mode cavities (using TE 102 , TE 201 and TE 301 modes) are effectively stimulated with a simple capacitive feeding near the diagonal line of the cavity. Surface current distribution is firstly analyzed for the optimal positions of slot radiators. Two rectangular slots are etched on the top surface of the SIW cavity, which are used to interfere the original current flow of one particular mode and generate radiation. These orthogonal dual-modes are used to obtain a filtering response. Their resonance frequencies are close to each other leading to field rotation and interaction with a radiation null generated outside the passband. The radiation and filtering function are achieved simultaneously by the dual-mode cavity, therefore only one cavity is required, resulting in a compact and simple antenna configuration. Good agreement has been observed between the simulation and measurement. They offer a variety of nice features, such as interesting working mechanism, lowprofile, high radiation gain and good passband selectivity, which are also suitable for high-frequency antenna application. INDEX TERMS Dual-mode cavity, dual-mode filter, filtering antenna, planar antennas, slot antennas, substrate integrated waveguide (SIW).

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Half-Mode Cavity-Based Planar Filtering Antenna With Controllable Transmission Zeroes

Cited by 67 publications

References 7 publications

Design of Compact Vertically Stacked Siw End-Fire Filtering Antennas With Transmission Zeros

Design of Compact Vertically Stacked Siw End-Fire Filtering Antennas With Transmission Zeros

Development of a Circularly Polarized Hmsiw Antenna

Development of Low-Profile Filtering Antennas With Dual-Mode Cavities

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