Design and system applications of a 61-GHz dual-beam flat antenna with grating structures on a dielectric waveguide

Zong-Wen Li; Wolfgang Menzel

doi:10.1117/12.182997

19 August 1994 Design and system applications of a 61-GHz dual-beam flat antenna with grating structures on a dielectric waveguide

Zong-Wen Li, Wolfgang Menzel

Author Affiliations +

Proceedings Volume 2211, Millimeter and Submillimeter Waves; (1994) https://doi.org/10.1117/12.182997
Event: Millimeter and Submillimeter Waves and Applications: International Conference, 1994, San Diego, CA, United States

Abstract

According to Floquet's Theorem and Brillouin Principle, a two beam radiation antenna based on inverted strip dielectric waveguide (ISDG) with grating structures for both dielectric grating and metallic strip grating is investigated and tested. The radiation characteristics of a 61 GHz dual-beam flat antenna with symmetry in respect to the broadside direction are plotted. The beamwidths of 4.5 degree(s) and 18.5 degree(s) in E-plane and H-plane are observed, respectively. Millimeter Wave dual-beam flat antennas will be of potentially wide applications, such as aircraft, tracking radar, collision avoidance, car navigation system and true ground speed information with a required high accuracy and rejection the measurement error. The FMCW Doppler Systems using single- and dual-beam antenna at 61 and 40 GHz have been constructed with high sensitivity. The millimeter wave integrated front ents are connected with the dual-side-band heterodyne receiver and the Digital Signal Processing (DSP) system of a Fast Fourier Transform (FFT) frequency analyzer and the two sidebands separation circuits. The direction of flying aircraft to be inclined toward can be corrected by dual-beam system. The true ground speed of the vehicle can be measured exactly by it also, when the vehicle has the vertical component of movement speed. The Doppler direction of the target can be discriminated immediately with the single-beam system. For extremely low costs by very simple MMW system using two mixer diodes and a 3 db hybrid at the Doppler frequency, the Doppler direction can be discriminated also.

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Zong-Wen Li and Wolfgang Menzel "Design and system applications of a 61-GHz dual-beam flat antenna with grating structures on a dielectric waveguide", Proc. SPIE 2211, Millimeter and Submillimeter Waves, (19 August 1994); https://doi.org/10.1117/12.182997

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KEYWORDS

Antennas

Doppler effect

Dielectrics

Digital signal processing

Extremely high frequency

Waveguides

Receivers

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