Analysis of an End Launcher for an X-Band Rectangular Waveguide

Deshpande, M.D.; Das, B.N.; Sanyal, G. S.

doi:10.1109/tmtt.1979.1129715

Cited by 29 publications

(16 citation statements)

References 4 publications

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“…The field pattern inside the waveguide can be determined by solving Maxwell equations. The wave port solver used computes, for each mode m specified, the electric field mode pattern E m (x, y) and the propagation constant γ m using Equation (2).…”

Section: Methodsmentioning

confidence: 99%

“…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%

“…The input reactance cancelation was obtained by a trial and error method. The same authors together with Deshpande reported an improved formulation that takes into account the explicit expression of both real and imaginary parts of the input impedance seen by coaxial line in terms of loop dimensions [2]. The centric as well as offset loop feeds, were implemented in circular and rectangular waveguides [2,3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Bojovschi¹,

Gray²,

Ghorbani³

2013

PIER M

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show abstract

“…A detailed theoretical analysis of in‐line transitions in the form of an L‐shaped loop is carried out in Ref. . An equivalent circuit for a class of end launchers is found in Ref.…”

Section: Introductionmentioning

confidence: 99%

In‐line stepped ridge coaxial‐to‐rectangular waveguide transition with capacitive coupling

Gatti

Rossi

Dionigi

2018

Int J RF Microw Comput Aided Eng

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An original in‐line coaxial‐to‐rectangular waveguide transition including stepped ridged sections is presented. This device differs from the state of the art because of the coaxial inner conductor not being in electrical contact with the ridge, leading to considerable mechanical advantages. In addition to this, capacitive coupling can extend the bandwidth even with a few matching sections when compared with the traditional counterpart presenting DC contact with the first ridge. An ultra‐compact transition is designed, manufactured, and tested in back‐to‐back configuration. From measured data, a return loss better than 20 dB on a bandwidth of 1.27 GHz (12.2%) is observed in this configuration. An average insertion loss of 0.11 dB can be derived for the standalone transition.

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“…Coaxial-to-rectangular waveguide transitions operating over narrow frequency bands can be designed using electric probes or magnetic loops, whose configuration depends on a few parameters that are easy to determine (Keam and Williamson 1994;Deshpande et al 1979;Bialkowski et al 2000). However, wideband transitions typically include complex, bulky 3D structures that can be complicated to mass produce (Yi et al 2011;Bang and Ahn 2014;Tako et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of compact wideband coaxial-to-waveguide transitions with minimum-size control

Hassan

Wadbro

Hägg

et al. 2017

Struct Multidisc Optim

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This paper presents a density-based topology optimization approach to design compact wideband coaxialto-waveguide transitions. The underlying optimization problem shows a strong self penalization towards binary solutions, which entails mesh-dependent designs that generally exhibit poor performance. To address the self penalization issue, we develop a filtering approach that consists of two phases. The first phase aims to relax the self penalization by using a sequence of linear filters. The second phase relies on nonlinear filters and aims to obtain binary solutions and to impose minimum-size control on the final design. We present results for optimizing compact transitions between a 50-Ohm coaxial cable and a standard WR90 waveguide operating in the X-band (8-12 GHz).

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Analysis of an End Launcher for an X-Band Rectangular Waveguide

Cited by 29 publications

References 4 publications

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

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

In‐line stepped ridge coaxial‐to‐rectangular waveguide transition with capacitive coupling

Topology optimization of compact wideband coaxial-to-waveguide transitions with minimum-size control

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