A Monolithically Printed Filtering Waveguide Aperture Antenna

Mahmud, Rashad H.; Jarjees, Raad Salih; Yu, Yang; Nugoolcharoenlap, Ekasit; Skaik, Talal; Attallah, Moataz M.; Wang, Yi

doi:10.1109/lawp.2023.3235275

Cited by 4 publications

(5 citation statements)

References 26 publications

(28 reference statements)

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“…They are optimized to keep f 0 at 10 GHz. In our work, 10,20 an aperture antenna based on waveguide cavity-resonator has been designed. It has been re-designed here (called Antenna-II now) for comparison purpose as shown in Figure 2B.…”

Section: Waveguide Aperture Antenna Designmentioning

confidence: 99%

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

Mahmud,

Mohammed,

Jarjees

et al. 2024

Micro & Optical Tech Letters

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This article proposes a new design of a circularly polarized (CP) aperture antenna based on a dual‐mode rectangular waveguide cavity‐resonator. A capacitive iris is employed to attain a strong coupling between the cavity and the input port, resulting in a larger fractional bandwidth (FBW) than a conventional aperture antenna. Another capacitive iris is embedded at the corner of the radiating aperture and extended into the cavity to maintain equal amplitude and a phase difference of 90° between the radiated electric (E) fields of the TE101 and TE110 modes, and thus yielding CP radiation. The proposed antenna has been fabricated using a computer numerical control machine. The antenna has an FBW of 18% at center frequency (f0) f0 = 10 GHz when the reflection coefficient (S11) S11 = −10 dB. The 3‐dB axial ratio bandwidth is 7%. A gain of 8.0 dBic is found at 10.06 GHz. The low profile and competitive performance of the antenna make it a good candidate in radar applications.

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Section: Waveguide Aperture Antenna Designmentioning

confidence: 99%

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

Mahmud,

Mohammed,

Jarjees

et al. 2024

Micro & Optical Tech Letters

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“…The input resonator is excited by a standard WR-90 waveguide through a rectangular iris. Furthermore, the iris at the aperture of the open-ended waveguide resonator is utilized to match its complex admittance to the generator's real admittance across a wide BW [9,11,21].…”

Section: Waveguide Filtering Antennamentioning

confidence: 99%

“…The design reported in [7] has a larger bandwidth than ours; however, there is no report of a TZ. In [11], TZs on both sides of the stopband are achieved at the expense of larger volume per resonator. Hence, this design is not suitable for applications which demand compactness.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

“…Another wideband evanescentmode open-ended waveguide filtering antenna has been reported with an FBW of 15% in [8]. Further, a filtering waveguide aperture antenna has also been reported with an FBW of 13.4% [9]. The selectivity of these wideband filtering antennas needs to be increased to reduce adjacent channel interference due to the presence of an overcrowded electromagnetic spectrum [10].…”

Section: Introductionmentioning

confidence: 99%

“…Conventionally, the selectivity of filtering antennas is increased by introducing transmission zeros (TZs) in their filtering response. Recently, TZs have been realized in wideband waveguide-filtering antennas using a cross-coupled resonatorbased structure [11]. However, this waveguide-filtering antenna occupies a large volume.…”

Section: Introductionmentioning

confidence: 99%

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A Compact Wideband Waveguide Filtering Antenna with Transmission Zero

Haider,

Basu,

Koul

2024

PIER Letters

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This letter describes the design of a compact, wideband waveguide filtering antenna with a transmission zero (TZ) in the upper stopband. A novel frequency-variant coupling (FVC) network that provides a TZ in addition to the pole is used to achieve compactness and higher selectivity. The position of the TZ can be changed in the upper stopband by altering the physical parameters of the proposed FVC. The radiating waveguide aperture is matched to the real admittance of the generator over a wide bandwidth by utilizing coupledresonator theory. This leads to a wide fractional bandwidth of 23%, along with a TZ at the upper stopband. The filtering antenna has been manufactured using metal 3-D printing to achieve low manufacturing costs and light weight. The measured results are in good agreement with the simulated ones, which shows the feasibility of the proposed FVC structure for the design of the compact waveguide filtering antenna with a TZ.

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Seamless Integration Technology for Filtenna Toward 5G/6G Wireless Communications

Hong,

Guo,

Hao

2024

IEEE Open J. Antennas Propag.

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The fifth generation (5G) mobile communication systems employ technologies such as massive MIMO, millimeter-wave (mmWave), and ultra-dense networks to support higher transmission data rate and lower latency, thereby enabling commercial deployment. Furthermore, the forthcoming sixth generation (6G) networks will integrate terrestrial and non-terrestrial networks, aiming to achieve full spectrum, full applications, and global coverage. Whether in the context of 5G or 6G networks, base transceiver stations (BTS) require a substantial number of radio frequency (RF) transceiver chains and antenna array, particularly in mmWave frequency bands. It is known that bandpass RF filters between antenna elements and transceivers are key components for suppressing out-of-band spurs and interference. The single board seamless integration of transceivers and antennas has become a growing trend. It means there is no extra room for a large number of filters at mmWave bands, leading to the emergence of integrated designs that combine filtering circuitry with antennas, known as filtenna or filtering antenna. With illustrated examples, the design methodologies, operational principles, and implementation strategies of filtennas are reviewed in this paper.

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A Monolithically Printed Filtering Waveguide Aperture Antenna

Cited by 4 publications

References 26 publications

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

A low‐profile circularly polarized cavity‐based waveguide aperture antenna

A Compact Wideband Waveguide Filtering Antenna with Transmission Zero

Seamless Integration Technology for Filtenna Toward 5G/6G Wireless Communications

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