A Dual Circular-Polarized Extremely Thin Monopulse Feeder at &lt;italic&gt;W&lt;/italic&gt;-Band for Prime Focus Reflector Antenna

Kou, Peng Fei; Cheng, Yu Jian

doi:10.1109/lawp.2018.2886905

Cited by 30 publications

(8 citation statements)

References 18 publications

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“…Microstrip monopulse antennas present lower complexities; they are light-weight and easier to fabricate at a lower cost, but their performance degrades due to spurious radiation at high frequencies [15][16][17][18][19][20]. Moreover, at W-band, losses become quite high, affecting the overall efficiency of the system [21]. Such drawbacks have been mitigated by using substrate-integrated waveguide (SIW) technology [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

High‐gain tapered monopulse antenna based on octuple excitation method in diffusion bonding technology at W‐band

Mahmoud,

Tomura,

Ettorre

et al. 2024

IET Microwaves Antenna & Prop

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The authors present the design, fabrication and testing of a W‐band monopulse antenna. This antenna consists of three main building blocks: an array with 48 × 48 slots, a tapered corporate‐feed network and a comparator. The comparator has four input ports to generate sum and difference patterns in orthogonal cardinal planes for monopulse operation. A novel octuple excitation is adopted for the corporate network to achieve a side lobe level lower than −20 dB for the sum patterns and simultaneously reduce drastically the manufacturing complexity. Diffusion bonding technology is used for fabrication. Twenty‐four etched copper sheets with a thickness of 0.2 mm are stacked to realise the prototype. The total size of the antenna is , with λ0 being the wavelength at the centre frequency (94 GHz). The antenna presents an isolation better than 12 dB among the input ports in the 84–100 GHz band. The realised measured gain is 40.7 dBi at 94 GHz. The measured 3‐dB gain bandwidth is 17.4%. The difference patterns at 94.0 GHz present null depths of −24.0, −18.0, −17.5, and −17.4 dB, in the E‐, H‐, 45°‐, and 135°‐planes, respectively.

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Section: Introductionmentioning

confidence: 99%

High‐gain tapered monopulse antenna based on octuple excitation method in diffusion bonding technology at W‐band

Mahmoud,

Tomura,

Ettorre

et al. 2024

IET Microwaves Antenna & Prop

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“…5,6 In conventional monopulse antennas, waveguide slot arrays and reflector antennas with monopulse feeders are used to achieve the monopulse performance. [7][8][9][10][11] Typically, such antennas are heavy and complicated, and expensive to fabricate. In recent years, planar monopulse antennas exhibit attractive advantages of small volume, low profile, simple structure, and convenient fabrication, 12,13 such as microstrip arrays and substrate integrated waveguide (SIW) slot arrays.…”

Section: Introductionmentioning

confidence: 99%

“…In conventional monopulse antennas, waveguide slot arrays and reflector antennas with monopulse feeders are used to achieve the monopulse performance 7–11 . Typically, such antennas are heavy and complicated, and expensive to fabricate.…”

Section: Introductionmentioning

confidence: 99%

A 2D substrate integrated waveguide monopulse slot antenna array with dual‐mode comparator

Sun

Liu

et al. 2022

Int J RF Mic Comp-Aid Eng

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A double-layer 2D substrate integrated waveguide monopulse slot antenna array is proposed. By adopting the dual-mode monopulse comparators (DMCs), the isolations between ports are significantly improved. The antenna generates "sum" and "difference" patterns in the orthogonal axis with a pair of DMCs.The DMC for azimuth plane tracking and the radiating 4 Â 4 slots are located on the top layer, and another DMC is on the bottom layer for the elevation plane tracking and feeds the slot array through two coupling slots. Based on the proposed antenna, an antenna prototype is fabricated. The measured À10 dB shared impedance bandwidth for four ports is 6.18% (9.4-10 GHz) and the isolations between ports are better than 27 dB. The null depths of the difference patterns are lower than À35 dB. The measured results are in good agreement with the simulated results.

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“…A planar W-band SIW monopulse slot array antenna, with a 16-way divider, a sum-difference compactor and 16 × 16 slots integrated on a singlelayer printed circuit board (PCB), is proposed in [6]. In [7], a single-layer extremely thin dual circularpolarized monopulse feeder at W-Band, which is consist of a sequential rotated 2 × 2 tilted SIW slots antenna array and a SIW comparator, is realized for a prime focus reflector antenna. In addition, based on a novel magic-tee with a wide amplitude and phase balance bandwidth, 60 GHz 1-D and 2-D monopulse antenna arrays with 4 × 4 slots are designed in [8].…”

Section: Introductionmentioning

confidence: 99%

A Single-Layer SIW Slots Array Monopulse Antenna Excited by a Dual-Mode Resonator

Yang

Zhao

et al. 2019

IEEE Access

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The conventional monopulse comparator, which commonly consists of a power divider, a standard 3dB-coupler and a 90-degree phase shifter, occupies a significantly large area of the antenna aperture. This results in a low efficiency. In order to improve the antenna's aperture efficiency and keep a planar single-layer structure simultaneously, a substrate integrated waveguide (SIW) slots array monopulse antenna excited only by a square dual-mode (TE 120 and TE 210) SIW resonator is proposed, fabricated and measured in this communication. The sum and difference beams are obtained when the feeding cavity operates at two high-order modes, respectively. The needless of complex feeding network reduces the antenna's structure complexity and improves its aperture efficiency. The aperture efficiency of the antenna can reach 42%. Besides, the sum and difference ports have good isolation due to the orthogonality between the two modes. The proposed antenna obtains a 100 MHz impedance bandwidth, determined by the reflection coefficient less than −10 dB. The measured gain of the sum pattern is 11.9 dBi at 10 GHz, while the null depth of the difference pattern is lower than −27 dB. INDEX TERMS Monopulse antenna, substrate integrated waveguide (SIW), aperture efficiency, dual-mode resonant cavity.

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A Dual Circular-Polarized Extremely Thin Monopulse Feeder at <italic>W</italic>-Band for Prime Focus Reflector Antenna

Cited by 30 publications

References 18 publications

High‐gain tapered monopulse antenna based on octuple excitation method in diffusion bonding technology at W‐band

High‐gain tapered monopulse antenna based on octuple excitation method in diffusion bonding technology at W‐band

A 2D substrate integrated waveguide monopulse slot antenna array with dual‐mode comparator

A Single-Layer SIW Slots Array Monopulse Antenna Excited by a Dual-Mode Resonator

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