Design of waveguide/coaxial transition for the band 2.5–4.1 Gc/s

Dix, Jeff

doi:10.1049/piee.1963.0036

Cited by 15 publications

(10 citation statements)

References 3 publications

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“…A coaxial-to-waveguide transition is introduced to accommodate interface requirements in this research, as the most common transmission structure is based on waveguides in high-power applications. In the design, a multi-section stepped ridge is properly placed into waveguide to realise perfect transition [22].…”

Section: Design Of Coaxial-to-waveguide Transitionmentioning

confidence: 99%

X‐band compact coaxial power combiner for high‐power applications

Meng

Xia

Guo

et al. 2019

IET Microwaves, Antennas & Propagation

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A four‐way power combiner with small cross‐sectional size and high power capacity is investigated in this study. The design is based on the cascaded structure of three rectangular hybrid rings and one coaxial‐to‐waveguide transition. The combiner consists of coaxial and waveguide structures to ensure high power capacity. The compact cross‐sectional size (0.71 λ × 0.74 λ at the centre frequency) is achieved by employing transverse electric magnetic (TEM)‐mode coaxial line structures. A prototype power combiner is fabricated and tested to verify the design results. It has been demonstrated that the proposed power combiner has a power capacity of 16 kW. The return loss is better than 25 dB, isolation degree higher than 27 dB, and amplitude imbalance within 0.16 dB limits in the operating band 8–9 GHz, validated with both simulations and experiments. The proposed structure is suitable for kW‐level power combining and it can also be implemented in planar forms for a wider range of applications.

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Section: Design Of Coaxial-to-waveguide Transitionmentioning

confidence: 99%

X‐band compact coaxial power combiner for high‐power applications

Meng

Xia

Guo

et al. 2019

IET Microwaves, Antennas & Propagation

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“…The in-line coaxial-to-waveguide transition has been proposed since the 1960s [20] and it has been employed to feed open-waveguide arrays [21]. The L-shaped coaxial configurations [22,23] are a first common technique to short the launcher, but a folded conductor is a challenging task, especially in mm-wave technology, and it is overcome by patch antenna launchers [24] or by shorting the launcher directly on a tapered ridge or multi-section one quarter wavelength-length transformer ridges, which allow the matching over a wide bandwidth [25,26]. Despite the aforementioned complexity, the L-shaped solution has been widely used for horn antennas, even leading to patented devices, such as [27].…”

Section: Introductionmentioning

confidence: 99%

An In-Line Coaxial-to-Waveguide Transition for Q-Band Single-Feed-Per-Beam Antenna Systems

et al. 2021

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An in-line transition between a coaxial cable and rectangular waveguide operating in Q-band (33–50 GHz) is presented. The aim of the work is to minimize the modifications in the waveguide to the strictly necessary to overcome the manufacturing issues due to the high frequencies involved. In addition, the transition is compact and it does not increase the space occupation on the transverse section, this suggests its application in horn antennas clusters arrangement. The operating principle consists of both a modal conversion and an impedance matching between the devices. The modal conversion is realized in an intermediate region, where the coaxial penetrates in the waveguide: the device geometry is designed so that the electric field in the transition is a trade-off between the TEM mode of the coaxial and the TE10 of the guide. A shaped waveguide backshort and a reactive air gap in the coaxial cable co-participate to achieve the matching. An optimized Chebyshev stepped transformer completes the transition to fulfil the impedance mismatch with the full waveguide. The design issues and technological aspects are considered. The influences of the feeding pin misalignment, the presence of groove is included in the analysis and these practical aspects are discussed and numerically validated via the scattering parameters analysis of the proposed design. The return loss is higher than 25 dB over the whole Q-band.

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“…These transitions create the family of microwave components that find wide applications in microwave and waveguide techniques. Among these the most popular and well investigated are the loop transitions [1][2][3] and the stepped or linearly tapered ridge waveguide sections [4,5]. In these launchers the grounding is achieved by direct connection to the broad wall.…”

Section: Introductionmentioning

confidence: 99%

“…In these launchers the grounding is achieved by direct connection to the broad wall. Posts that slide through slots in the broad wall are also used for adjusting the impedance of the waveguide section of interest to improve matching [5]. Wheeler reported the first loop transition in 1957 [6].…”

Section: Introductionmentioning

confidence: 99%

A Loop-Type End-Launcher for Carbon Fiber Reinforced Polymer Waveguides

Bojovschi¹,

Gray²,

Ghorbani³

2013

PIER M

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The analysis of an end-launcher type transition from coaxial to WR90 waveguides is presented. This transition is tuned to have the highest performance at the radar frequency of 9.375 GHz. The characteristics of the transducer are investigated comparatively in 30 cm aluminum and carbon fiber reinforced polymer waveguides. The advantage of the proposed feed is that it does not require grounding to the broad wall of the waveguide compared to the traditional endlauncher loop feeds. This departure from the current loop feeds makes the proposed feed suitable for carbon fiber reinforced polymer waveguides where a disruption in the broad wall would be undesirable.

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Design of waveguide/coaxial transition for the band 2.5–4.1 Gc/s

Cited by 15 publications

References 3 publications

X‐band compact coaxial power combiner for high‐power applications

X‐band compact coaxial power combiner for high‐power applications

An In-Line Coaxial-to-Waveguide Transition for Q-Band Single-Feed-Per-Beam Antenna Systems

A Loop-Type End-Launcher for Carbon Fiber Reinforced Polymer Waveguides

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