A K/Ka-Band Reconfigurable Substrate Integrated Coaxial Line to Waveguide Transition Technology

Wei, Yifang; Arnold, Christian

doi:10.1109/access.2022.3184020

Cited by 6 publications

(4 citation statements)

References 23 publications

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“…To get some preliminary results of the beamforming system, the reconfigurable K/Ka-band beamforming samples with a 2×2 waveguide antenna array are designed to demonstrate the beamforming operational performance. To that end, a cost-effective 1-4 microstrip feeding network is deployed for the demonstration, where the microstripto-waveguide transition designs are similar to that for the SICL-to-waveguide transition which is mentioned in [11]. The rectangular waveguide transition structure with stepped transformers is used in this 2×2 beamforming array, due to the rectangular waveguide structure is suitable to connect the waveguide antenna in the beamforming array system.…”

Section: Figure 1 Conceptual Beamforming System Networkmentioning

confidence: 99%

“…From some recent dual-band waveguide transition designs and research [9], [10], to achieve a dual K/Ka-band operation performance, they will commonly restrict and sacrifice the bandwidth and the performance. In article [11], a substrate integrated coaxial line (SICL) K/Ka-band reconfigurable structure waveguide transitions design could provide wideband performance, whose reconfigurable structure is also suitable for microstrip-to-waveguide transition in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Multiport Beamforming System Based on Reconfigurable Waveguide Phased Antenna Array for Satellite Communication Applications

Wei

Arnold

2023

IEEE Access

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In this article, a multiport beamforming system based on the reconfigurable waveguide phased antenna array is presented, which is fed by the microstrip single-layer multiport feeding network.The reconfigurable waveguide transitions and waveguide linear-polarized/circular-polarized antenna arrays have high flexibility to meet different requirements in beamforming applications according to the design purposes, which is also suitable for satellite communication applications with separate transmitted and received systems. Both simulated and experimental results are presented for the demonstration. Results indicate that the multiport beamforming system based on the reconfigurable waveguide phased antenna array could provide wideband performance at both K/Ka-band with flexible functions compared with the conventional single-layer beamforming systems. Beamforming, reconfigurable, dual-band, satellite communication. INDEX TERMS

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Section: Figure 1 Conceptual Beamforming System Networkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiport Beamforming System Based on Reconfigurable Waveguide Phased Antenna Array for Satellite Communication Applications

Wei

Arnold

2023

IEEE Access

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“…On the other hand, a multi-stepped waveguide transition can be designed in a short length, allowing relatively good return loss and higher-order mode suppression [15]. Stepped waveguide transitions have been widely adopted for the broadband transition between coaxial cables, rectangular waveguides, and microstrip lines [16], [17], [18]. The power combiner using two-stepped waveguide was introduced in [19], where Ka-band waveguide was enlarged by ~1.7 times in both E-and Hplane to accommodate two dipole-transition trays.…”

Section: Introductionmentioning

confidence: 99%

Ka-Band Tray-Type Spatial Power Combiner Using H-Plane Expanded Waveguide With Side-Ridges

Park

Jeong

2023

IEEE Access

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A tray-type spatial power combiner is proposed at Ka-band using an H-plane expanded waveguide with side-ridges and a dipole transition array. In order to overcome the small size of the Ka-band standard waveguide and accommodate as many as trays (six trays in this work), the H-plane of the waveguide is expanded by three times using two-stepped waveguide transition. A circular post is employed to effectively suppress higher-order modes in the expanded waveguide. In addition, a side-ridged waveguide is proposed to reduce non-uniformity in the field and power distribution along the expanded H-plane which seriously degrades power combining efficiency. It boosts the electric field close to the waveguide sidewalls by adding the metallic ridges which reduces the waveguide height at the sides. It is shown from the simulation that the proposed side-ridged waveguide can evenly distribute the electromagnetic power and reduce the magnitude imbalances between the trays. In addition, a capacitive iris is introduced in the ridges to improve the phase balance as well. The H-plane expanded waveguide with side-ridges was fabricated and the measurement showed an insertion loss as low as 0.2 dB at Ka-band. Then, six trays consisting of dipole transition and microstrip line on the dielectric substrate was accommodated between the H-plane expanded waveguides with side-ridges. The overall power combining system exhibited the measured insertion loss of 1.2 dB (backto-back loss) at Ka-band. This result belongs to the excellent performance in terms of insertion loss and the number of the trays among the tray-type spatial power combiners reported at Ka-band.INDEX TERMS Expanded waveguide, millimeter-wave, spatial power combiner, waveguide transitions.

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“…With the development of array antenna technology [19], research on the direction finding and localization of satellite navigation interference sources has become a popular field. Currently, space filtering [20][21][22][23], adaptive beamforming [24][25][26], and DOA estimation technology [27][28][29] based on array antenna technology have begun to be applied in the field of satellite navigation interference monitoring and anti-interference.…”

Section: Introductionmentioning

confidence: 99%

Satellite Interference Source Direction of Arrival (DOA) Estimation Based on Frequency Domain Covariance Matrix Reconstruction

Yao,

Zhao,

Bai

et al. 2023

Sensors

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Direction of arrival (DOA) estimation is an effective method for detecting various active interference signals during the satellite navigation process. It can be utilized for both interference detection and anti-interference applications. This paper proposes a DOA estimation algorithm for satellite interference sources based on frequency domain covariance matrix reconstruction (FDCMR) to address various types of active interference that may occur in the satellite navigation positioning process. This algorithm can estimate the DOA of coherent signals from multiple frequency points under low signal-to-noise ratio (SNR) conditions. The signals received from the array are transformed from the time domain to the frequency domain using a fast Fourier transform (FFT). The data corresponding to the frequency point of the target signal is extracted from the signal in the frequency domain. The frequency domain covariance matrix of the received array signals is reconstructed by utilizing its covariance matrix property. The spatial spectrum search method is used for the final DOA estimation. Simulation experiments have shown that the proposed algorithm performs well in the DOA estimation under low SNR conditions and also resolves coherency. Moreover, the algorithm’s effectiveness is verified through comparison with three other algorithms. Finally, the algorithm’s applicability is validated through simulations of various interference scenarios.

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A K/Ka-Band Reconfigurable Substrate Integrated Coaxial Line to Waveguide Transition Technology

Cited by 6 publications

References 23 publications

Multiport Beamforming System Based on Reconfigurable Waveguide Phased Antenna Array for Satellite Communication Applications

Multiport Beamforming System Based on Reconfigurable Waveguide Phased Antenna Array for Satellite Communication Applications

Ka-Band Tray-Type Spatial Power Combiner Using H-Plane Expanded Waveguide With Side-Ridges

Satellite Interference Source Direction of Arrival (DOA) Estimation Based on Frequency Domain Covariance Matrix Reconstruction

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