Compact Full Band OMT Based on Dual-Mode Double-Ridge Waveguide

Abdelaal, Mohamed A.; Shams, Shoukry I.; Moharram, M. A.; Elsaadany, Mahmoud; Kishk, Ahmed A.

doi:10.1109/tmtt.2018.2825402

Cited by 30 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2010, Pu et al [16] presented an ultralow-loss coupler for interfacing a silicon-on-insulator ridge waveguide and a singlemode fiber in both polarizations. In 2018, Abdelaal et al [17] utilized a nonstandard dual-mode, double-ridge waveguide to design a compact orthomode transducer. In 2018, Yu [18] proposed an optimal structural design of a circular cylindrical ridge wave ultrasonic motor.…”

Section: Introductionmentioning

confidence: 99%

Dispersion Analysis and Material Property Identification of a Circular Piezoelectric Ridge Waveguide

2021

Journal of Computational and Nonlinear Dynamics

View full text Add to dashboard Cite

This study investigates the dispersive properties of ridge waves that travel circumferentially around piezoelectric circular ridge waveguides and investigates their resonant modes. Based on the variable separation method and Hamilton's principle, the displacement of ridge waveguides is represented as the product of a cross-sectional coordinate-dependent function and the propagator along the circumference of a circular ridge waveguide. The dispersion curves of the flexural waves and resonant frequencies corresponding to ridge waveguides are solved numerically by applying the bi-dimensional finite element method (Bi-d FEM) and using the 3D ANSYS package. The estimated impedance curves are compared with the predicted dispersion curves of waves from ridge waveguides to validate the proposed numerical approach. The geometric parameters and elastic constants of the piezoelectric circular ridge waveguide are determined through an inverse scheme that is based on the measured resonant frequencies and uses the modified simplex method. The numerical and experimental results show that, using the modified simplex method to inverse calculate the elastic constants and geometric parameters of the piezoelectric circular ridge waveguides, a good degree of accuracy and sensitivity can be achieved.

show abstract

Section: Introductionmentioning

confidence: 99%

Dispersion Analysis and Material Property Identification of a Circular Piezoelectric Ridge Waveguide

2021

Journal of Computational and Nonlinear Dynamics

View full text Add to dashboard Cite

show abstract

“…Orthomode transducers (OMT) have been widely investigated [1][2][3][4] and are used to split signal polarization. An OMT is employed in the transmitting or receiving of two orthogonally polarized signals (eg, the uplink and downlink paths in satellites), which can double the channel capability.…”

Section: Introductionmentioning

confidence: 99%

An x‐band waveguide orthomode transducer with integrated filters

Gao

Shang

Wang

et al. 2019

Micro & Optical Tech Letters

View full text Add to dashboard Cite

This letter presents a novel waveguide orthomode transducer (OMT) with integrated filters. Resonator‐based bandpass filters are used for the two channels forming a duplexing OMT. As an example, a two‐channel duplexing OMT is designed with channels at 9.9‐10.1 GHz and 10.9‐11.1 GHz. A good filter response with 20 dB return loss is achieved for both the channels. The upper and lower bands are isolated to −80 dB due to the filtering elements and a transmission zero. This new multifunction compact filter‐OMT design leads to the size reduction and improved inter‐band isolation. A CNC machined waveguide OMT is demonstrated and its performance is verified with excellent agreement between the electromagnetic wave (EM) simulation and measured results.

show abstract

“…There are many examples of these applications such as electronic beam scanning systems [1]- [3] or circularly polarized antenna systems [4]- [6]. This can be performed by adding the phase shifter with any type of orthomode transducers to produce two orthogonal polarizations with 90 • phase shift [7], [8]. The phase shifter can be implemented through many techniques such as delay lines [9], active element based phase shifters [10]- [13], and anisotropic element based phase shifters.…”

Section: Introductionmentioning

confidence: 99%

Rectangular Waveguide Differential Phase Shifter Based on Horizontal Ferrite Tiles: Accurate Model for Full-Band Operation

2019

Self Cite

View full text Add to dashboard Cite

Phase shifters are one of the most important elements deployed in the antenna feeding structures. They are being used in several antenna systems for various applications. Moreover, they can be used in different microwave devices such as circulators and isolators. Furthermore, they are one of the commonly used components in circularly polarized antenna systems. They can be deployed using different techniques depending on the required electrical specifications and the power handling capability. Phase shifters with horizontal ferrite tiles have a higher power handling capability than the transistor based. Thus, this type of phase shifter was frequently visited in the literature. However, the previously presented models were either inaccurate or had a narrow validity range. Here, mathematical analysis and study have been performed for non-reciprocal differential phase shifters using two horizontal ferrite tiles based on waveguide technology. A new model is proposed along with the transcendental equation for the phase constant. The presented model is validated through comparison with various standard waveguides over the full band operation. Moreover, an experimental validation step is carried out, where the measured results have acceptable values. INDEX TERMS Non-reciprocal components, ferrite, waveguide differential phase shifter, horizontal ferrite slabs, full-band phase shifter.

show abstract

Compact Full Band OMT Based on Dual-Mode Double-Ridge Waveguide

Cited by 30 publications

References 32 publications

Dispersion Analysis and Material Property Identification of a Circular Piezoelectric Ridge Waveguide

Dispersion Analysis and Material Property Identification of a Circular Piezoelectric Ridge Waveguide

An x‐band waveguide orthomode transducer with integrated filters

Rectangular Waveguide Differential Phase Shifter Based on Horizontal Ferrite Tiles: Accurate Model for Full-Band Operation

Contact Info

Product

Resources

About