Mono-grooved circular waveguide polarizers

Yoneda, Naofumi; Miyazaki, Moriyasu; Horie, Tadao; Satou, Hiroyuki

doi:10.1109/mwsym.2002.1011757

Cited by 19 publications

(8 citation statements)

References 5 publications

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“…Thus, it should be treated as a four-port microwave network. The overmoded rectangular waveguide is the essential portion which transmits the TE 10 and TE 20 modes at the same time (without any other modes). The two modes then generate two degenerated and orthogonal TE 11 modes which should have equal amplitude but 90 • phase difference after optimizing the parameters of the structure; thus, the function of the S-band waveguide dual circular polarizer can be realized.…”

Section: Principle and General Scattering Matrixmentioning

confidence: 99%

“…Port 1 and Port 2 are the standard S-band rectangular waveguides (72.14 mm×34.04 mm). The overmoded waveguide transmits TE 10 and TE 20 modes, and the width a of it should meet the condition of λ < a < 3/2 λ, which is 105 mm < a < 157.5 mm for the frequency of 2856 MHz. (λ is the working wavelength in free space.)…”

Section: Design Procedures Of the S-band Waveguide Dual Circular Polarmentioning

confidence: 99%

“…And for the dielectric septum polarizer, the relative high loss is another disadvantage. The dual circular polarizer which has the groove [10,11], circular step and pins is complicated [12]. Another dual circular polarizer which has one stub between two rectangular waveguides and two pins at the bottom of the cylindrical waveguide has very compact structure [13].…”

Section: Introductionmentioning

confidence: 99%

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Design and cold test of an S-band waveguide dual circular polarizer

Pei

Hou

et al. 2017

Radiat Detect Technol Methods

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Purpose An S-band dual circular polarizer has been designed and tested with low power in the paper, which will be applied in a spherical cavity pulse compressor. It converts the TE 10 mode in rectangular waveguide into two polarization degenerated TE 11 modes in cylindrical waveguide. Methods The general scattering matrix of the dual circular polarizer has been deduced based on the properties of the passive microwave network, which is suitable for the usual 3 dB coupler, as well as the left/right hand circular polarizer. Based on the 3D code software CST, the dual circular polarizer was numerically simulated. Then, two prototypes have been manufactured and tested with the vector network analyzer (VNA). Results The simulation results show that the magnitudes and phase difference of the two TE 11 modes are − 3.0103/− 3.0104 dB and 89.79 degrees, respectively. The cold test results show good agreement with CST simulation. Conclusion The method of analyzing the relationship between the voltage standing wave ratio (VSWR) and the errors of the magnitudes and phase difference of the two TE 11 modes was given, which can be used to qualitatively analyze the properties of the circular polarizer. The S-band waveguide dual circular polarizer can be applied in the pulse compressor, phase shifter or other frequency bands.

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Section: Principle and General Scattering Matrixmentioning

confidence: 99%

Section: Design Procedures Of the S-band Waveguide Dual Circular Polarmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and cold test of an S-band waveguide dual circular polarizer

Pei

Hou

et al. 2017

Radiat Detect Technol Methods

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“…A polarizer with single groove in Ref. [7] was researched. To keep the symmetric of the polarizer in this paper, a pair of large grooves are adopted, which can realized a broad bandwidth because it excites higher order modes, and weakens the frequency dependence of the phase variation βL, where L is the length of the groove and β is the propagation constant.…”

Section: The Design Of the Dual Circular Polarizermentioning

confidence: 99%

“…The circular polarizer is usually designed to convert one linearly polarized mode into two orthogonal modes with a 90-degree phase shift by loading the discontinuities of septum [3][4][5], corrugations [6][7][8][9], dielectrics [10,11]. The waveguide septum polarizer has the advantage of compact size with three physical ports, but has a very limited bandwidth duo to phase shift of two orthogonal modes [12]; the dielectric-loaded polarizer has relative high loss.…”

Section: Introductionmentioning

confidence: 99%

Theory and Experiment of a Compact Waveguide Dual Circular Polarizer

Chang¹,

Church²,

Tantawi³

et al. 2012

PIER

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Abstract-A new compact and wide-band waveguide dual circular polarizer at Ka-band is presented and tested in this paper. This compact structure is composed of a three-port polarizing diplexer and a circular polarizer realized by a simple pair of large grooves. The polarizing diplexer includes two rectangular waveguides with a perpendicular H-plane junction, one circular waveguide coupled in Eplane. A cylindrical step and two pins are used to match this structure. For a LHCP or RHCP wave in the circular port, only one specific rectangular port outputs power and the other one is isolated. The accurate analysis and design of the circular polarizer are conducted by using full-wave electromagnetic simulation tools. The optimized dual circular polarizer has the advantage of compact size with a volume smaller than 1.5λ 3 , broad bandwidth, uncomplicated structure, and is especially suitable for use at high frequencies such as Ka-band and above. The prototype of the polarizer has been manufactured and test, the experimental results are basically consistent with the theories.

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A high-power microwave circular polarizer and its application on phase shifter

Shao

Chang

et al. 2016

Review of Scientific Instruments

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A high-power waveguide dual circular polarizer was theoretically designed and proof-of-principle was experimentally tested. It consists of two incident rectangular waveguides with a perpendicular H-plane junction, one circular waveguide with a pair of trapezoidal grooves coupled in E-plane at the top, a spherical crown located at the bottom, and an iris at the perpendicular junction of two rectangular waveguides. When wave incidents at one of the two separated rectangular waveguides, it, respectively, generates a left-hand circular polarized wave or a right-hand circular polarized wave in the circular waveguide. By adding a dumbbell-like metal plug driven with a high speed servomotor, a movable short circuit is formed along the circular waveguide to adjust the output RF phase of the rectangular port, realizing a high-speed high-power phase shifter. The C-band high power microwave (HPM) experiments were carried out, and the power capacity of the HPM polarizer and phase shifter was demonstrated to reach gigawatt level.

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Mono-grooved circular waveguide polarizers

Cited by 19 publications

References 5 publications

Design and cold test of an S-band waveguide dual circular polarizer

Design and cold test of an S-band waveguide dual circular polarizer

Theory and Experiment of a Compact Waveguide Dual Circular Polarizer

A high-power microwave circular polarizer and its application on phase shifter

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