Compact colinear end-launcher for rectangular waveguides

Simeoni, M.; Coman, C.I.; Lager, Ioan E.

doi:10.1109/mwsym.2005.1516891

Cited by 6 publications

(9 citation statements)

References 12 publications

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“…The device can be interpreted as a cavity-backed patch antenna that radiates into a rectangular waveguide or as a cascade of guiding structures. The latter approach permits a description of the junction's functioning in terms of modal couplings between the modes of the different guiding structures composing the end-launcher (see [5]). …”

Section: Singly Tuned Patch End-launchermentioning

confidence: 99%

“…As already anticipated in [5], the concept at the basis of the patch end-launcher can be extended to multiply tuned configura- tions by employing a strategy that is reminiscent of the approach used for designing the doubly tuned loop launcher described in [4]. Basically, it amounts to optimizing the matching between the structure's input and output ports at a number of relatively closely spaced frequencies such that to broaden the frequency band of operation.…”

Section: Doubly Tuned Patch End-launchermentioning

confidence: 99%

“…An alternative to the L-shaped loop launchers has been proposed in [5]. The configuration consisted of a cavity-backed patch antenna [6], [7] that radiates into a rectangular waveguide, in view of exciting the fundamental TE-mode.…”

mentioning

confidence: 99%

“…The proposed configuration provides an excellent matching of the coaxial input to the rectangular waveguide at a single frequency, complemented by an acceptable matching over a relatively wide frequency. For example, the -band patch end-launcher demonstrated in [5] was characterized by an input reflection coefficient lower than 10 dB over a fractional bandwidth of up to 14%. Furthermore, that patch end-launcher was compared with an L-shaped loop-launcher tuned at the same fre- The concept introduced in [5] is now generalized by proposing multituned, patch end-launchers.…”

mentioning

confidence: 99%

“…For example, the -band patch end-launcher demonstrated in [5] was characterized by an input reflection coefficient lower than 10 dB over a fractional bandwidth of up to 14%. Furthermore, that patch end-launcher was compared with an L-shaped loop-launcher tuned at the same fre- The concept introduced in [5] is now generalized by proposing multituned, patch end-launchers. Stacked patch antennas that radiate into rectangular waveguides are employed for exciting the fundamental mode.…”

mentioning

confidence: 99%

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Patch end-Launchers-a family of compact colinear coaxial-to-rectangular waveguide transitions

Simeoni

Coman

Lager

2006

IEEE Trans. Microwave Theory Techn.

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Abstract-A new family of structures launching the fundamental mode in rectangular waveguides is proposed. Individual or stacked cavity-backed patch antennas radiate into a rectangular waveguide, providing a good matching with a coaxial input over a wide frequency range. The configuration results in a very compact, colinear transition from a standard coaxial connector to a rectangular waveguide. The components have applications as general-purpose coaxial-to-rectangular waveguide transitions and are well suited for low-profile, phased-array antennas. Experimental results confirm the computational estimations of the proposed components' performance.

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Section: Singly Tuned Patch End-launchermentioning

confidence: 99%

Section: Doubly Tuned Patch End-launchermentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Patch end-Launchers-a family of compact colinear coaxial-to-rectangular waveguide transitions

Simeoni

Coman

Lager

2006

IEEE Trans. Microwave Theory Techn.

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Octave bandwidth in‐line rectangular waveguide‐to‐coaxial transition using oversized mode conversion

Cano¹,

Mediavilla²

2017

Electron. lett.

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A very low-loss in-line rectangular waveguide-to-coaxial transition covering an octave bandwidth is presented. In order to obtain such frequency coverage, the transition employs oversized mode conversion, i.e. the rectangular waveguide dimensions are internally enlarged to modify the cavity cutoff frequency while obtaining good matching properties for a standard rectangular waveguide output port. A fourstep ridge transformer is included for the TE-to-TE 10 mode conversion in the whole frequency range. The transition, completed with a commercial SMA connector for the coaxial port, exhibits a return loss of around 25 dB with 0.1 dB insertion loss when measured in back-toback configuration in the 10-20 GHz frequency range. From these results, an input matching around 30 dB and an insertion loss around 0.05 dB for a stand-alone transition can be inferred.

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