A W-Band Rectangular Waveguide TE10 to Circular Waveguide TE02 Mode Converter

Xu, Yong; Mao, Ya; Luo, Yong; Liu, Zhihang; Wang, Weijie; Li, Hao; Wang, W.; Li, Hongfu

doi:10.1109/tmtt.2021.3074616

Cited by 9 publications

(1 citation statement)

References 29 publications

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“…Waveguide power dividers have been widely used in many devices, such as high-power transmitters, power amplifiers, antenna array feed networks and multiplexers [1,2,3,4,5]. By employing a slow branching Y-junction, followed by the impedance matching steps, waveguide power dividers that operates over full waveguide band are developed in [6,7].…”

Section: Introductionmentioning

confidence: 99%

A novel H-plane based T-junction waveguide power divider for WR-10

Zhang

Chen

Liu

2022

IEICE Electron. Express

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In this paper, a novel H-plane T-junction waveguide power divider that can operate on the entire W-band is in troduced,it can save more space in many applications. It solves the problem that the traditional Hplane T-junction waveguide power divider cannot cover the entire W-band and the reflection coefficient is less than −20 dB. A H-plane T-junction power divider for the size of WR-10 waveguide are designed and fabricated used a blocking plate, two grooves and a stepped input matching transformer. The measured results agree well with the simulations and It is suitable for the whole frequency band of W, and the reflection coefficient is less than −20 dB. The optimized design size can also be used for other waveguides.

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Section: Introductionmentioning

confidence: 99%

A novel H-plane based T-junction waveguide power divider for WR-10

Zhang

Chen

Liu

2022

IEICE Electron. Express

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Theoretical designs and experiments on dual-band input coupler for gyrotron traveling wave tube

et al. 2023

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In this paper, a novel K/Ka dual-band input coupler for the gyrotron traveling wave tube is theoretically and experimentally investigated. This input coupler mainly consists of three modules, a Y-type power division coupler, a coaxial cavity coupler, and a Bragg reflector. When the dual-band coupler operates in K-band, the Y-type coupler couples out the TE11 mode, and simulation results show the −1 dB bandwidth is 3.3 GHz in the frequency range of 17.9–21.2 GHz. In Ka-band, the TE21 mode coupled out by the coaxial cavity coupler, the −1 dB bandwidth is 3.5 GHz within 33.7–37.2 GHz, and the reflection coefficient keeps a pretty low level. The prototype was fabricated and measured to further verify the designed dual-band input coupler's performance. The back-to-back cold test results show that the −3 dB bandwidth of the K-band is about 2.5 GHz, and the −3 dB bandwidth of the Ka-band is 2.44 GHz.

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Permittivity measurement of high-frequency substrate based on the double-sided parallel-strip line resonator method

Shen,

Gao,

Chen

et al. 2024

Review of Scientific Instruments

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With the development of 5G technology, the accurate measurement of the complex permittivity of a printed circuit board (PCB) in the wide frequency range is crucial for the design of high-frequency circuits. In this paper, a microwave measurement device and method based on the double-sided parallel-strip line (DSPSL) resonator have been developed to measure the complex permittivity of typical PCBs in the vertical direction. The device includes the DSPSL resonator, the DSPSL coupling probe, a pressure monitor, a Farran C4209 vector network analyzer (100 K to 9 GHz), and a FEV-10-PR-0006 frequency multiplier (75–110 GHz). Based on transmission line theory, the physical model of the DSPSL resonator was established, and the relative permittivity and loss angle tangent value of the dielectric substrate were calculated using conformal transformation. To excite the resonator, the DSPSL coupling probe with a good transmission effect was designed, which consists of DSPSL microstrip line (MSL) transition structure and an MSL-WR10 rectangular waveguide converter. To reduce the air gap between the sample and the metal guide band and dielectric support block, and to improve test accuracy, a mechanical pressure device is added to the top of the DSPSL resonator. Based on the DSPSL resonator, we have used the device to test four typical PCBs, namely, polytetrafluoroethylene, Rogers RT/duroid®5880, Rogers RO3006®, and Rogers RO3010®. The results show that the maximum error of the relative permittivity is less than 3.05%, and the maximum error of the loss angle tangent is less than 1.27 × 10−4.

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A W-Band Rectangular Waveguide TE₁₀ to Circular Waveguide TE₀₂ Mode Converter

Cited by 9 publications

References 29 publications

A novel H-plane based T-junction waveguide power divider for WR-10

A novel H-plane based T-junction waveguide power divider for WR-10

Theoretical designs and experiments on dual-band input coupler for gyrotron traveling wave tube

Permittivity measurement of high-frequency substrate based on the double-sided parallel-strip line resonator method

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