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公开(公告)号：US20220115986A1
公开(公告)日：2022-04-14
申请号：US17496984
申请日：2021-10-08
Inventor： Dong Hwan Shin , Dong Pil Chang , Byoung Hak Kim , Seong Mo Moon , In Bok Yom , Jun Han Lim , Jin Cheol Jeong , In Kwon Ju
Abstract: Provided is a FET resistive frequency mixing device having improved RF-LO and IF-LO isolations. The frequency mixing device includes: a field effect transistor (FET), a local oscillation matching circuit connected to a gate of the FET to transfer a local oscillation signal to the gate of the FET, a gate biasing circuit connected to the gate of the FET, a radio frequency (RF) matching circuit having a first terminal connected to a drain side of the FET and a second terminal serving as a RF terminal to receive or output a RF signal, an intermediate frequency (IF) matching circuit having a first terminal connected to the drain side of the FET and a second terminal serving as an IF terminal to receive or output an IF signal, and a series resonance circuit providing a path from the drain of the FET to ground for the local oscillation signal.
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公开(公告)号：US12206383B2
公开(公告)日：2025-01-21
申请号：US17945212
申请日：2022-09-15
Inventor： Jun Han Lim , Seong Mo Moon , Jin Sek Park , Dong Pil Chang
Abstract: Disclosed is a dual-band phase shifter in which series/parallel resonance circuits are applied to a polyphase filter to implement a phase shifter, which is a core block of a multi-channel RFIC for implementing a phased array antenna system. The dual-band phase shifter may be configured by converting a capacitor (C) of an LC circuit or a CL circuit in the RFIC into a series resonance circuit and converting an inductor (L) thereof into a parallel resonance circuit, so that a signal generator operating in one frequency band can operate in a dual-band.
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公开(公告)号：US12294334B2
公开(公告)日：2025-05-06
申请号：US18156894
申请日：2023-01-19
Inventor： Jinseok Park , Seong Mo Moon , Byoung Sun Lee , Jun Han Lim , Dong Pil Chang
IPC: H03D7/16
Abstract: An I/Q signal generating apparatus and phase shift apparatus using the same are provided, the I/Q signal generating apparatus including: a first resonance circuit whose one end is connected to a first input terminal and whose other end is connected to a first output terminal; and a second resonance circuit whose one end is connected to the other end of the first resonance circuit or a second input terminal, and whose other end is connected to a second output terminal, wherein the first resonance circuit and the second resonance circuit each include a resistor, a capacitor connected in parallel with the resistor, and an inductor connected in a form of a cross between the resistor and the capacitor.
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公开(公告)号：US11527996B2
公开(公告)日：2022-12-13
申请号：US17496984
申请日：2021-10-08
Inventor： Dong Hwan Shin , Dong Pil Chang , Byoung Hak Kim , Seong Mo Moon , In Bok Yom , Jun Han Lim , Jin Cheol Jeong , In Kwon Ju
Abstract: Provided is a FET resistive frequency mixing device having improved RF-LO and IF-LO isolations. The frequency mixing device includes: a field effect transistor (FET), a local oscillation matching circuit connected to a gate of the FET to transfer a local oscillation signal to the gate of the FET, a gate biasing circuit connected to the gate of the FET, a radio frequency (RF) matching circuit having a first terminal connected to a drain side of the FET and a second terminal serving as a RF terminal to receive or output a RF signal, an intermediate frequency (IF) matching circuit having a first terminal connected to the drain side of the FET and a second terminal serving as an IF terminal to receive or output an IF signal, and a series resonance circuit providing a path from the drain of the FET to ground for the local oscillation signal.
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