C-band orthomode transducer for compact and broadband antenna feeders

Ruiz‐Cruz, Jorge A.; Montejo‐Garai, José R.; Rebollar, J.M.; Montero, José M.

doi:10.1049/el.2009.1034

Cited by 20 publications

(11 citation statements)

References 4 publications

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“…The two antennas and the LP filter in Figure 3 can be replaced by OMTs and a single antenna [30,52]. It can produce both vertical and horizontal polarizations by employing an antenna, as indicated in Figure 8.…”

Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

“…Metamaterial-based RMCPs and TMCPs are alternative methods to produce CP from linearly polarized antennas, as indicated in Figure 3. In addition, a waveguide circular polarizer can be used after the OMT with a 45° rotation to convert the horizontally polarized wave in the waveguide to LHCP and the vertically The two antennas and the LP filter in Figure 3 can be replaced by OMTs and a single antenna [30,52]. It can produce both vertical and horizontal polarizations by employing an antenna, as indicated in Figure 8.…”

Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

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Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

Fartookzadeh

2018

Challenges

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Value engineering (VE) and function analysis (FA) are technological tools for the functional enhancement and cost reduction of engineering projects. They also help to overcome mental inertia by acknowledging the voice of the customer in complicated systems. Antenna engineering, providing electromagnetic remote links, is an important area in engineering science, with a large number of innovative concepts. However, managing innovative ideas to improve performance, reliability, quality, safety, and reduce life cycle costs, is still a work in progress. This research was designed to apply VE and FA as frameworks for innovative ideas in antenna systems, especially with regard to imaging and radar systems. FA diagrams free a designers' mind from tools to instead focus on purpose, which can help them to obtain better ideas for solutions to problems. It was identified that there were several options available for functionality enhancement and cost reduction. The required functionalities of the components of antenna systems, and their advantages and limitations were indicated. In addition, it was identified that some of the advantages and limitations appeared for combinations of the components. Alternative methods for applications, such as polarization conversion and the separation of outgoing and incoming electromagnetic waves, were studied. Circular polarization (CP) is important for two-way communication, since left-handed circularly polarized waves usually return with right-handed CP from targets. Therefore, various methods for producing CP were discussed, such as metamaterial-based linear to circular polarization converters and waveguide polarizers. Also, potential extra applications for these systems were explained. Two examples were: (1) merging multiple systems with different operating frequencies using multiband components; and (2) applying a feeding system for multiple reflectors using surfaces that reflect half of the wave and transmit the other half. Consequently, it was identified that the clearance of existing functions, prioritization of customers, identification of system bottlenecks requiring innovative methods, and better communication between users and designers, were the key benefits of VE and FA.

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Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

Fartookzadeh

2018

Challenges

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“…The capacity of antennas can be increased by simultaneously transmitting and receiving two pairs of signals on the same transmit and receive frequencies if the two pairs of transmit and receive signals are polarized [2]. For dual-band and dual-linear polarization antenna, one type of feed system is composed of two parts: wide-band orthomode transducer (OMT) and diplexer [3]. The diplexer is used for separating Rx and Tx linearly polarized signals.…”

Section: Introductionmentioning

confidence: 99%

“…Several diplexers were reported in the past [3][4][5][6][7][8][9][10][11]. A C-band diplexer is proposed in [3].…”

Section: Introductionmentioning

confidence: 99%

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A Wideband Waveguide Diplexer for the Extend C-Band Antenna Systems

Wang¹,

Du²,

Wu³

et al. 2016

PIER C

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Abstract-A wideband diplexer for the extended C-band feed antenna system is proposed in this paper. The diplexer operates in the receiving band (Rx) 3.625-4.8 GHz and transmitting band (Tx) 5.85-7.025 GHz, which give 28% and 19% bandwidths at Rx and Tx bands, respectively. In order to cover such a broadband, a side coupling T-shaped junction and a corrugated low-pass filter scheme are adopted. The T-shaped junction and the filter are designed separately, and then combined for optimization. A prototype is fabricated and measured. Measured results show a good agreement with the calculated ones. The return loss is less than −21 dB, transmission loss less than 0.21 dB, Rx/Tx isolation better than 45 dB, and Tx/Rx isolation better than 70 dB.

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Wideband orthomode transducer for the Square Kilometre Array band4 single pixel feed

Wang

Yang

2019

Int J RF Microw Comput Aided Eng

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The design of a compact wideband orthomode transducer (OMT) for band4 single pixel feed of the Square Kilometre Array (SKA) dish is presented. The geometry of the proposed OMT is based on circular quad-ridged waveguide to obtain wideband characteristics, which consists of a coaxial to quad-ridged waveguide transition and a circular to quad-ridged waveguide tapered transition. By adopting circular quadridged waveguide and high-order cosine taper for the ridges, the length of OMT is compact and the levels of higher-order modes generated at the circular waveguide aperture are lower. To verify the OMT performance, a prototype is manufactured and tested using a vector network analyzer. The measured results agree very well with the calculated ones across the frequency range 2.8-5.18 GHz. The tested reflection coefficients are less than -19 dB, the insertion losses are less than 0.25 dB for both polarization channels, and the isolation between two output ports is better than 37.7 dB. It is confirmed that the designed OMT can be satisfied with the requirement of the SKA band4 feed system. K E Y W O R D Sorthomode transducer, quad-ridged waveguide, Square Kilometre Array, wide band

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C-band orthomode transducer for compact and broadband antenna feeders

Cited by 20 publications

References 4 publications

Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

A Wideband Waveguide Diplexer for the Extend C-Band Antenna Systems

Wideband orthomode transducer for the Square Kilometre Array band4 single pixel feed

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