An X‐band substrate integrated waveguide (SIW) attenuator is presented for the first time. To gain the desired attenuation level, a resistive π‐network was structured using standard surface‐mount device resistors while retaining a predefined mode transition and impedance matching condition. The attenuator prototype features the measure of attenuation level (−1, −3, and −5dB) across 8.04–11.12 GHz frequency range. The attenuator may contribute to design of a genuine SIW circuit.
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Eom et al. (2014) studied this question.
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