Abstract
In this article, a compact electromagnetic band-gap (EBG) structure is presented to reject harmonics of a crystal oscillator in the power distribution network. Compared to traditional EBG structures of complementary split ring resonator (CSRR), the proposed CSRR adding lumped capacitors (LC-CSRR) provides a higher rejection-performance at the series self-resonant frequency of the lumped capacitors. A four-layer printed circuit board is designed and fabricated to measure the S-parameters of the proposed EBG structure, and a harmonics power testing board is presented to measure rejection performance of the proposed EBG structure. The measured results show that the proposed EBG obtains an attenuation of 60 dB over the whole range of global navigation satellite system band. By inserting the proposed EBG structure of LC-CSRR, we measure that the harmonics powers can be decreased by 28.8 dB between the input and output of the EBG.
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