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A 76GHz phased array antenna using a waffle-iron ridge waveguide with a non-metal contact structure has been developed. The structure has the advantages of avoiding losses due to imperfect metal contact and facilitating the construction of small-size multi-layer stacked structures. The principle of a 16-column phased array antenna with a size of 62mm× 62mm× 25mm is presented. It is shown that the...
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