US 12,149,268 B2
Terahertz full-duplex co-local oscillator solid-state front-end transmitting circuit
Bo Zhang, Chengdu (CN); Zhongqian Niu, Chengdu (CN); Xiaobo Yang, Chengdu (CN); Yinian Feng, Chengdu (CN); Yi Hu, Chengdu (CN); Bingli Dai, Chengdu (CN); Jicong Zhang, Chengdu (CN); Yong Fan, Chengdu (CN); Yihong Su, Chengdu (CN); Hongbin Wang, Chengdu (CN); and Yafei Wu, Chengdu (CN)
Assigned to University of Electronic Science and Technology of China, Chengdu (CN)
Filed by Univ. Electronic Science and Technology of China, Chengdu (CN)
Filed on Dec. 26, 2022, as Appl. No. 18/146,428.
Prior Publication US 2023/0238990 A1, Jul. 27, 2023
Int. Cl. H04B 1/04 (2006.01); H01Q 13/08 (2006.01); H04B 1/03 (2006.01); H04L 5/14 (2006.01)
CPC H04B 1/0458 (2013.01) [H01Q 13/08 (2013.01); H04B 1/03 (2013.01); H04L 5/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A terahertz full-duplex co-local oscillator solid-state front-end transmitting circuit, comprising:
a local oscillator tripler having a first output terminal and a first input terminal,
a branched waveguide directional coupler having a first local oscillator input terminal, a coupling terminal and a through terminal,
a terahertz subharmonic mixer,
a terahertz doubler having a third input terminal, a fourth input terminal and a third output terminal,
an orthogonal mode coupled duplexer having a fifth input terminal, a sixth input terminal and a fourth output terminal,
a branched waveguide directional coupler, and
a transmitting antenna; wherein:
the first output terminal is connected to the first local oscillator input terminal;
the coupling terminal is connected to the second local oscillator input terminal, and the through terminal is connected to the third input terminal;
the second output terminal is connected with the fifth input terminal;
the third output terminal is connected with the sixth input terminal;
the fourth output terminal is connected with the transmitting antenna;
the local oscillator tripler is configured to double a frequency of a drive signal from a local oscillator, and then transmit the frequency-doubled drive signal to the branched waveguide directional coupler;
the branched waveguide directional coupler is configured to divide the frequency-doubled driving signal into a first power signal having a first power and a second power signal having a second power different from the first power;
the terahertz doubler is configured to receive and multiply a frequency of the first power signal to generate a first branch transmission signal;
the terahertz subharmonic mixer is configured to receive the second power signal and mix the second power signal with an input intermediate frequency signal to generate a second branch transmission signal; and
the orthogonal mode coupled duplexer is configured to receive the first branch transmission signal and the second branch transmission signal respectively at the fifth input terminal and the sixth input terminal, combine the first and the second branch transmission signals into a single transmission signal, and provide the single transmission signal to the transmitting antenna.