Signal Processing for Communication Systems
Articles in this series Phased array antenna — an introduction Electronic scanning arrays Grating lobes in electronic scanning Array pattern multiplication (this article) Introduction So far the radiators were mathematical points. Real dipoles and patches have their own angular patterns. If the elements are identical and oriented the same way, the total far-field pattern factors … Read more
Articles in this series Phased array antenna — an introduction Electronic scanning arrays Grating lobes in electronic scanning (this article) Array pattern multiplication Introduction A uniform array samples the aperture field at equal intervals. Sample too coarsely and the far-field pattern aliases—the same idea as undersampling a time signal. The aliases show up as grating … Read more
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
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