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In this paper, the design of the waveguide power transmission components for the General Armament Department of the contract items, the seeker system applied to a particular model, play power transmission, filtering, detection and monitoring role, its structure, including the main waveguide coupling mechanism, detection and filtering components. This thesis is divided into six parts each system design and analysis. First, the basic theory and technical indicators of the waveguide transmission components, diode detector filter circuit, followed by the design of the detector components. The transition method of the waveguide to the detection member in the design of the waveguide using a gradient-type connection, discussed several ways. Finally, using a test instrument for the finished design on the detector filter circuit, and the entire assembly, commissioning, and gives the test results of the samples in the Ku-band frequency range. Testing index of reach of the entire assembly: the detector voltage sensitivity than 600mV/mW (SMA connector), the VSWR is less than 1.25, and insertion loss of LT; 0.6 dB, the impact test, the random vibration test, a temperature cycle test, salt spray test. Temperature cycle test, due to the instability of the temperature characteristics of the detector diodes, and high and low temperature test -55 ℃ ~ 85 ℃ case detection more difficult to achieve stability index, the relevant sections in this article also discussed ways to improve it. This article several major innovations: a diode detector filter circuit designed in this paper uses a hybrid integrated technology, the entire detector filter circuit is fabricated on an alumina ceramic substrate, placed in a rectangular cavity of 15mm × 20mm × 10mm, and waveguide coaxial conversion technology, the signal is coupled to the cavity inside the microwave cavity for microstrip filter circuit, the external connection standard SMA connector, miniaturization, integration, not only to meet the requirements of the project, and can be widely used in other microwave components such as: aerospace confrontation, radar receivers, microwave remote sensing guide in the first-class components. 2 summarizes several waveguide coupling to other transport agencies, the paper systematically elaborated Fourth typical detector structure composition and design ideas. Finalize the optimum design and put into mass production, the bandwidth of the products reach 3GHz, apparently improved significantly than the original microstrip Through Hole detector With hundreds of megabytes or 1GHz. The degree of coupling of the coupling mechanism 3. Improved microstrip detector pinhole is insufficient, the mechanical manufacturing error of the through hole on the impact detector and other factors, with the coupling of the coaxial probe, the degree of coupling is very easy to achieve the requirements, and coaxial package diode, easy to install, reliable structure, stable work. To change the position of the probe and the length of the same, the design of this detector can be applied to the other bands. The power transmission system as a whole, and a control member, the assembly plays an important role. Entire assembly tests of indicators, the the installed components work very stable.
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