Design Of Terahertz Power Divider And Duplexer

Most of the amplifier output power in the terahertz band is still in the milliwatt level.In order to achieve multi-channel,high-efficiency,high-output power synthesis in the terahertz band,we must conduct in-depth research on the THz power synthesis network.At the same time,in order to meet the increasingly high requirements of modern microwave communications for filter performance,this paper also studies the design of terahertz duplexers.The main tasks are as follows:1.Based on the E-plane waveguide-microstrip probe theory,a rectangular waveguide-microstrip dual-probe transition structure at 220 GHz is designed.This design has the advantages of simple structure,low loss and easy heat dissipation.At the same time,due to the special design of the dual probe,a two-way function can be realized,and the design of the power synthesis network is also simplified,making the overall structure more compact and concise.The transitional back-to-back structure is cast and tested.2.Based on the theory of waveguide T-branching,the E-plane T-junction and crisscross quadrupole waveguide power dividers are studied and analyzed.A simulation design of a three-stage binary E-plane T-junction cascaded eight-way power synthesis network and a two-stage cross-crustal structure sixteen-way power synthesis network was designed,followed by a cascade of eight binary T-junctions.The power splitter and the two-probe transition structure are connected to form a sixteen-way power distribution/synthesizing network,and a sixteen-way power distribution/synthetic network is processed and tested.3.Based on the classical filter structure of H-face patch filter,an H-faced inductive coupling window bandpass filter with a center frequency of 190 GHz,a bandwidth of 5GHz and a center frequency of 220 GHz and a bandwidth of 10 GHz was designed.This kind of filter is widely used in the design and research of terahertz band filters because of its advantages such as high quality factor,low loss and easy processing..4.Design an E-plane T-junction and connect two H-plane filters to form the duplexer structure we need.Optimize the size of the T-junction to match it with the two bandpass filters.Processing and testing.