Millimeter-Wave Integrated Side-Fire Leaky-Wave Antenna and its Application as a Spectrum Analyzer
Daniel J. King, Mohamed K. Emara, Shulabh Gupta

TL;DR
This paper introduces a novel, integrated, shielded spectrum analyzer operating around 60 GHz using a side-fire Leaky-Wave Antenna design, demonstrating broadside radiation, beam focusing, and a 1 GHz resolution in a compact form.
Contribution
It presents a new side-fire LWA configuration for integrated spectrum analysis, including design, modeling, and experimental validation at millimeter-wave frequencies.
Findings
Operates effectively between 59-66 GHz with 1 GHz resolution.
Achieves beam focusing in the near-field for compactness.
Demonstrates broadside radiation and shielding capabilities.
Abstract
An analog, low-profile and shielded spectrum analyzer is proposed for operation at mm-wave frequencies around the 60 GHz band based on a novel side-fire Leaky-Wave Antenna (LWA) configuration. The proposed side-fire periodic LWA is systematically developed from a conventional 3-port waveguide T-junction which is modified to a LWA unit cell with an internal matching mechanism to suppress the stop-band and enable broadside radiation based on unit cell symmetry considerations. The resulting periodic side-fire antenna radiates in the plane of the antenna, whereby the leakage power be either be allowed to radiate in free-space or kept confined inside a PPW structure. The proposed side-fire structure thus can be completely shielded useful as an analog broadband spectrum analyzer using Substrate Integrated Waveguide (SIW) Technology. Furthermore, a convex side-fire antenna is demonstrated to…
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