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CNN vs. FIR Filter: Visualizing Neural Network Weights for Signal Processing

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Skeptical of ‘Black Box’ AI? We prove that a 1D Convolutional Neural Network (CNN) is mathematically identical to an adaptive FIR filter. Includes Python code to train a CNN to reinvent the Matched Filter and visualize its frequency response.

Grating lobes in phased arrays — when they appear and how to avoid them

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Grating lobes in electronic scanning: the spacing / scan-angle condition that creates false main beams, and design rules to keep them out of visible space.

Electronic Scanning Arrays

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Articles in this series Phased array antenna — an introduction Electronic scanning arrays (this article) Grating lobes in electronic scanning Array pattern multiplication Introduction Suppose the antenna cannot move — a radar on a mast, a panel on a tower — but you still need the beam to point somewhere else. That is electronic scanning: … Read more

Phased Array Antenna – an introduction

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Articles in this series Phased array antenna — an introduction (this article) Electronic scanning arrays Grating lobes in electronic scanning Array pattern multiplication Introduction Suppose you need a radar beam that jumps from one track to another in a few microseconds, or a base-station panel that must serve users across a sector without swinging a … Read more