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Frequency discriminator design phase formula with experimental verification for frequency measurement systems with uniform sub‐band resolution
Author(s) -
Sim Sungmin,
Lee Yeonsu,
Kim Jiwon,
Kang HyeLim,
LlamasGarro Ignacio,
Kim JungMu
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22771
Subject(s) - discriminator , frequency band , phase (matter) , signal (programming language) , line (geometry) , radio spectrum , frequency divider , radio frequency , power (physics) , scattering parameters , optics , interferometry , electronic engineering , physics , computer science , mathematics , power dividers and directional couplers , engineering , telecommunications , bandwidth (computing) , geometry , quantum mechanics , detector , programming language
In this article, we propose a frequency discriminator (FD) design method to produce uniform frequency sub‐bands. FDs are designed using an interferometer projected with the proposed formulated phase. For experimental verification that a uniform sub‐band is formed using the proposed phase formula, 3‐bit FDs are designed and fabricated to operate in the 2 to 3 GHz and 2 to 4 GHz bands, respectively. The FD consists of a power divider/combiner, reference line, and delay line. Scattering parameters of the FDs are analyzed using RF simulation and measurement results. RF characteristic results show that a 3‐bit FD designed using the proposed phase formula can identify an unknown signal inside the defined frequency band.