4 ms·

Noob antenna question: in a phased array is most transmit energy lost to destructive interference? I thought that the beam was just the region where the waves

• JumpCrisscross 2y ago
  > in a phased array is most transmit energy lost to destructive interference? No. Phased-array antennae can be up to 90% efficient [1]. You aren't losing energy to destructive interference so much as channeling it to the constructive modes. (Totally physically inaccurate, but I think analogously correct.) [1] https://www.mwrf.com/technologies/embedded/systems/article/21153102/nxtcomm-gain-efficiency-with-fragmented-aperture-phased-arrays https://www.mwrf.com/technologies/embedded/systems/article/2...
• grayfaced 2y ago
  Low gain where there is destructive interference and high gain where there is constructive interference. That is the feature. Same amount of energy is radiated, it is just amplified in the high-gain main lobe. A low gain direction is not the same as no signal though. With enough power you can overpower the main lobe signal. https://en.wikipedia.org/wiki/Gain_(antenna) https://en.wikipedia.org/wiki/Gain_(antenna)