Multifrequency waveguide orthomode transducer

Sharma, Shikha; Singh, Vijay Kumar; Chakrabarty, S. B.

doi:10.1109/tmtt.2005.852754

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…Several dual-band and multi-band OMTs in coupled waveguide, Fin line, planar and quad ridges waveguide configurations have been reported in the past [7][8][9][10][11][12]. The design of dual/multi-band OMTs is very complex as it should operate over wide band of frequencies, and port to port isolation should also be met.…”

Section: Introductionmentioning

confidence: 99%

Realization of Ku-Band Ortho Mode Transducer With High Port to Port Isolation

Verma¹,

Kumar²

2018

PIER Letters

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Abstract-Present paper describes the design, development and evaluation of a wideband, compact Ku-band orthomode transducer (OMT) for SATCOM application. It consists of a square waveguide output section, square waveguide to rectangular waveguide transition, straight waveguide port and an orthogonally coupled port. A tapered waveguide section has been used to couple the orthogonal RF (Radio Frequency) signal to the common port. The designed OMT has a transmit port with frequency band 13.75 GHz-14.5 GHz and a receive port with frequency band 10.95-12.5 GHz. Finite element method based ANSYS's High Frequency Structure Simulator (HFSS) EM software has been used for simulation and optimization of OMT. Measured reflection coefficients of OMT over transmission and reception frequency bands are better than −15 dB and −12 dB, respectively. Designed OMT has port to port isolation better than 45 dB against 30 dB isolation of conventional OMT available in market.

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Section: Introductionmentioning

confidence: 99%

Realization of Ku-Band Ortho Mode Transducer With High Port to Port Isolation

Verma¹,

Kumar²

2018

PIER Letters

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“…Several dual-band and even multi-band OMTs were reported in the past [4][5][6][7][8][9]. In [4,5], two orthogonally polarized signals are separated at two different frequency bands.…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Ortho-Mode Transducer With Irregularly Shaped Diaphragm

Yao¹,

Shen²,

Liu³

2011

PIER Letters

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Abstract-A compact dual-band ortho-mode transducer is presented in this paper. Two orthogonally polarized signals received by a square waveguide are separated into two orthogonal channels at 10.7-12.75 GHz and 10.3-11.9 GHz, respectively, while a single-polarized signal is transmitted at 14-14.5 GHz. To obtain good isolation between the transmit (Tx) and receive (Rx) channels of the same polarization with a compact size, an irregularly shaped diaphragm is proposed as a compact dual-function resonator, which has one transmission zero at the Tx band and one pole at the Rx band. The designed OMT is fabricated and measured in a back-to-back configuration. Measured results agree very well with simulated ones and the isolation improvement by the diaphragm is about 15 dB, which verifies our design.

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“…l'\ owadays, for communication links of extreme high data rate, the capacity of one frequency band is insufficient even in the case of frequency reuse. Therefore, multiple frequency bands are exploited and multi-band OMTs are desired [12,18,19]. Different from the single-band OMT, the multi-band OMT has more than four electrical ports, and the isolation between the ports of the same polarization but operating at different frequency bands becomes an important concern and challenge.…”

Section: I\1otivationmentioning

confidence: 99%

“…A dual-band OMT operating at 30/44 GHz was designed in [67], which employed a series of stacked iriset> as a compact filtering dement to improve the isolation. A multi-frequency waveguide OMT operating at four frequency bands was impelemented by this approach [12].…”

Section: Turnstile Junction Omtmentioning

confidence: 99%

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Analysis and design of square waveguide ortho-mode transducers

Yao¹

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Multifrequency waveguide orthomode transducer

Cited by 9 publications

References 10 publications

Realization of Ku-Band Ortho Mode Transducer With High Port to Port Isolation

Realization of Ku-Band Ortho Mode Transducer With High Port to Port Isolation

Dual-Band Ortho-Mode Transducer With Irregularly Shaped Diaphragm

Analysis and design of square waveguide ortho-mode transducers

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