Wideband Circular TE<sub>21</sub>and TE<sub>01</sub>Mode Converters With Same Exciting Topologies

Wang, Yan; Wang, Li; Shu, Guoxiang; Dong, Kai; Wang, Jianxun; Yan, Ran; Fu, Hao; Yao, Yelei; Luo, Yong; Wang, Shafei

doi:10.1109/ted.2016.2596785

Cited by 32 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To verify the methodology and simulations, the back-toback measurement for the mode converters was used [5], [6], [23], [24]. Two identical TE 20 mode converters joined backto-back through an overmoded rectangular waveguide were machined from two brass blocks.…”

Section: Fabrication Measurement and Discussionmentioning

confidence: 99%

“…Two types of TE 20 -TE 10 mode converters, based on H -plane dual-bend and tri-bend rectangular waveguides, achieved a conversion efficiency of >95% in a fractional bandwidth of 12.8% and 10.3%, respectively [12]. (3) Another methodology to excite the TE 20 mode was based on a coupling aperture [5], [6], as shown in Fig. 1(c).…”

Section: Introductionmentioning

confidence: 99%

“…In some instances, it is desired that the input and output ports of the mode converter are aligned on the same axis [14]. Unfortunately, the coupling aperture [5], [6], and H -plane waveguide bend [10], [11] based mode converters could not satisfy such a requirement.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and Measurement of an H-Band Rectangular TE₁₀ to TE₂₀ Mode Converter

Shu

Qian

2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

A novel methodology of the mode conversion between rectangular TE 10 and TE 20 mode based on the H-plane T-junction power dividing network is proposed in this paper. A mode converter operating in the H-band (220-325 GHz) was analyzed and designed. To decrease the port reflection caused by the T-junction discontinuity, a septum and two symmetric irises were introduced in the converter. Two identical rectangular TE 20 mode converters joined back-to-back were manufactured by Nano-CNC machining and the electromagnetic properties were measured by using a vector network analyzer. A bandwidth of 228.8-293.1 GHz (64.3 GHz) for transmission coefficient S 21 around −1.0 dB and port reflection S 11 around −15.0 dB was measured. The measured results were in good agreement with the simulated ones and manifested high mode conversion efficiency. INDEX TERMS Rectangular mode converter, H-plane T-junction power dividing network, rectangular TE 20 mode, high order overmoded slow wave structure.

show abstract

Section: Fabrication Measurement and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and Measurement of an H-Band Rectangular TE₁₀ to TE₂₀ Mode Converter

Shu

Qian

2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

show abstract

“…While single target mode converter with known parameters is required for use in RF systems, the method can only get joint complex S-parameters of the two mode converters. Most literatures had to compare the measured |S 21 | curve with the back-to-back simulation results for design verification [13]- [17]. The single device's transmission phase parameters as well as reflection parameters cannot be measured, which are critical in some applications like power combination.…”

Section: Figure 1 Schematic Of the Back-to-back Methods For Measuringmentioning

confidence: 99%

“…These peaks may become so dense in some cases [16]- [18] that it is hard to judge the device's conversion efficiency and meet the test precision requirement of some high performance mode converters, whose required mode conversion efficiency is often higher than 95% and port voltage reflection ratio less than 10% [13]. Wang et al [17] simply explain that these peaks are caused by weak resonators existing between the identical converters, but provide no further tackling way. The other method used in some literatures [1]- [3], [5] is to measure the device's far-field E or H plane radiation pattern.…”

Section: Figure 1 Schematic Of the Back-to-back Methods For Measuringmentioning

confidence: 99%

A Method for Accurately Characterizing Single Overmoded Circular TM₀₁-TE₁₁ Mode Converter

et al. 2020

View full text Add to dashboard Cite

In the case of characterizing waveguide mode converter, the widely applied back-to-back method can only extract two mode converters' joint S-parameters, the accuracy of the far-field radiation pattern method is limited. This paper experimentally demonstrates a method for accurately characterizing single circular TM 01-TE 11 mode converter, which consists of extracting the asymmetric two-port TM 01 and TE 11 mode generator test fixtures' S-parameters and de-embedding them from the "TM 01 mode generator+ TM 01-TE 11 mode Converter+TE 11 mode generator" cascade measurement results. The peak problem occurring in measuring overmoded circular waveguide devices with VNA is analyzed and settled with an offset waveguide based peak-shifting tactic plus the Loess smoothing method. Fairly good agreement between the simulated and finally extracted complex S-parameter matrix of a TM 01-TE 11 mode converter throughout the device's working frequency span validates the proposed method's merits over traditional methods. INDEX TERMS asymmetric fixture, de-embedding, mode generator, overmoded mode converter, offset waveguide, S-parameter, thru-reflect-line (TRL) calibration.

show abstract