The Design And Simulation of 7mm Ortho-mode Transducer Microwave Receiver Room Yunwei Ning

What is the polarization of electromagnetic wave? Vertical Horizontal Linearly Polarized Signals

What is the polarization of electromagnetic? Right Circular Left Circular Radio Astronomy Definition To convert linear to circular, a 90 degree phase-shifter is needed which retards one of the linear polarizations. Circularly Polarized Signals

Why do we need OMT? 垂直极化水平极化 V/H ( 垂直 / 水平 )

The location of OMT in the receiver and why is the OMT is so important? Feed Horns OMT LNA

OMT 45º Twist 90º Phase Shifter  →  Transition Mylar Window Circular Polarizer LO Ref dBm Noise Diode Termination or Pulse Cal Input Magic Tee WG to Coax WG to Coax 22 dB KaDCM RF Post-Amp NF < 5 dB 8 dB IF Post-Amp NF < 2.5 dB x GHz GHz RCP IF Output 8-18 GHz DC-18 GHz KaDCM x GHz LCP IF Output 8-18 GHz 22 dB RF Post-Amp NF < 5 dB 8 dB IF Post-Amp NF < 2.5 dB GHz DC-18 GHz 35 dB LNA Coax to WG 2.9mm RCP Cal Coupler Quartz Window 2.9mm Coax to WG 35 dB LNA Quartz Window Cal Coupler LCP RF GHz Thirteenth Synthesis Imaging Workshop The location of OMT in the receiver and why is the OMT is so important?

The types of OMT CSIRO. Receiver Systems for Radio Astronomy

The types of OMT CSIRO. Receiver Systems for Radio Astronomy

What limit the bandwidth? CSIRO. Receiver Systems for Radio Astronomy

What limit the bandwidth? CSIRO. Receiver Systems for Radio Astronomy

What limit the bandwidth?

CSIRO. Receiver Systems for Radio Astronomy

What limit the bandwidth? CSIRO. Receiver Systems for Radio Astronomy TE (10) TE (2n+1 0) TE (10) TE (2n+1 2n)

Turnstile Junction Waveguide OMT CSIRO. Receiver Systems for Radio Astronomy

Turnstile Junction Pyramidal stub Square prism + pyramidal stub Cylindrical stub 2 cylinders conical stub 2 square prism

Turnstile Junction CSIRO. Receiver Systems for Radio Astronomy

E-plane bend CSIRO. Receiver Systems for Radio Astronomy

E-plane bend CSIRO. Receiver Systems for Radio Astronomy

Y-junction Power Combiner CSIRO. Receiver Systems for Radio Astronomy

Y-junction Power Combiner CSIRO. Receiver Systems for Radio Astronomy

7-step Tchebyschev Transformer CSIRO. Receiver Systems for Radio Astronomy

simulation result of OMT CSIRO. Receiver Systems for Radio Astronomy VSWR 1.18(1.5) Insertion Loss 0.04dB(0.3) Orthogonal isolation -46dB(-30)

Electric field vectors CSIRO. Receiver Systems for Radio Astronomy

the evolution of Turnstile Junction OMT

The comparison of two bfai Junction OMT CSIRO. Receiver Systems for Radio Astronomy

Dual ridge bfai Junction OMT CSIRO. Receiver Systems for Radio Astronomy

The next year plan 7mm corrugated horn

The next year plan High Electron Mobility Transistor (HEMT) 7mm low noise amplifier

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