Metallized-Substrate Multiband-Permittivity Measurement with NGD Ring Resonator

Citation Author(s):
Hongyu
Du
Submitted by:
Hongyu Du
Last updated:
Sun, 07/02/2023 - 09:52
DOI:
10.21227/qgqh-9482
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Abstract 

This paper explores an original research work on multiband metallized-permittivity measurement method for copper-clad substrates based on bandpass (BP) negative group delay (NGD) ring circuit. The multiband permittivity extraction formula from NGD center frequency harmonics is established from S-parameter model. The BP-NGD function specifications of are defined. The BP-NGD ring resonator (RR) proof-of-concept (PoC) consists of linearly coupled loops implemented in microstrip technology. The multiband permittivity measurement NGD-method validity is proved by well-agreed full wave simulations and measurements of NGD RR prototype. The test results of dielectric sample are validated in 1-10 GHz. Furthermore, uncertainty analyses under the maximum processing error are performed. The NGD-method effectiveness is confirmed with permittivity low measurement relative error lower than 0.5%.

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