A tunable Ka-band planar groove gap waveguide resonant cavity

Oyedokun, Titus; Geschke, Riana; Stander, Tinus

doi:10.23919/radio.2017.8242231

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…The tunability of the RGW is not widely-reported in the literature. For example, in [23], an electrically-tunable planar groove gap waveguide resonant cavity is presented. In the referred example, the tunability is achieved by using a nonlinear varactor element.…”

Section: E Frequency-tunable Rgw Couplermentioning

confidence: 99%

Analytical Design Procedure for Forward Wave Couplers in RGW Technology Based on Hybrid PEC/PMC Waveguide Model

Beltayib

Sebak

2019

IEEE Access

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In this paper, a systematic design methodology of a 0dB and a 3dB forward couplers based on the ridge gap waveguide (RGW) technology is presented. This methodology is based on exact theoretical formulations rather than any approximate or empirical equations. The procedure of the proposed design methodology is mainly to build a virtual equivalent waveguide model. This waveguide has two horizontal upper and lower perfect electric conductor (PEC) walls, while the left and the right walls are made of perfect magnetic conductors (PMC). A detailed analysis for this hybrid PEC/PMC waveguide, a common waveguide for coupling, is introduced as the starting phase for designing the RGW couplers. The equivalent RGW coupler that assures the same operation of the hybrid PEC/PMC waveguide at a specific frequency range is deduced based on detailed theoretical aspects. Moreover, a simple analyzing of transitional bends and phase shifters with accurate calculations is presented in this paper, which are the fundamental building blocks of several mmW components such as the six-port junction and the butler matrix. The possibility of tuning the coupler center frequency is introduced without the need of using any nonlinear elements. The resulting RGW couplers are implemented through well-known full wave simulator (Ansoft HFSS), with verification through prototype measurements in order to confirm the validity of the proposed methodology. A good agreement is achieved between measurement and simulation results. INDEX TERMS Hybrid forward couplers, periodic structure, ridge gap waveguide, hybrid PEC/PMC waveguide.

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Section: E Frequency-tunable Rgw Couplermentioning

confidence: 99%

Analytical Design Procedure for Forward Wave Couplers in RGW Technology Based on Hybrid PEC/PMC Waveguide Model

Beltayib

Sebak

2019

IEEE Access

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Implementation of tunable resonators in planar groove gap waveguide technology

Oyedokun

Geschke

Stander

2021

Int. J. Microw. Wireless Technol.

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We present a tunable planar groove gap waveguide (PGGWG) resonant cavity at Ka-band. The cavity demonstrates varactor loading and biasing without bridging wires or annular rings, as commonly is required in conventional substrate-integrated waveguide (SIW) resonant cavities. A detailed co-simulation strategy is also presented, with indicative parametric tuning data. Measured results indicate a 4.48% continuous frequency tuning range of 32.52–33.98 GHz and a Qu tuning range of 63–85, corresponding to the DC bias voltages of 0–16 V. Discrepancies between simulated and measured results are analyzed, and traced to process variation in the multi-layer printed circuit board stack, as well as unaccounted varactor parasitics and surface roughness.

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A tunable Ka-band planar groove gap waveguide resonant cavity

Cited by 2 publications

References 7 publications

Analytical Design Procedure for Forward Wave Couplers in RGW Technology Based on Hybrid PEC/PMC Waveguide Model

Analytical Design Procedure for Forward Wave Couplers in RGW Technology Based on Hybrid PEC/PMC Waveguide Model

Implementation of tunable resonators in planar groove gap waveguide technology

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