A three-channel broadband coaxial rotary hinge and its realization method

Abstract

The invention relates to a three-channel broadband coaxial rotary hinge and a realization method thereof, which mainly solve the transmission, coupling conversion and three-channel integration of the signals of the rotating end and the fixed end of the first channel. Transition reed 1 and transition reed 2 are used to realize electrical connection between the first channel rotary transition RF socket and the coaxial cable at the rotary end, and between the RF socket at the fixed end and the coaxial cable at the fixed end. The dielectric sleeve of the second channel is clamped tightly on the first channel. The outer conductor of the coaxial line at the fixed end of the first channel, and the transmission ring is embedded in the dielectric sleeve, so that the space size of the cavity of the first and second channels is small, the operating frequency of the rotary hinge is high, and the bandwidth is wide. The two radio frequency cables passing through the third channel sleeve and the rotating transition step shaft are connected to the first and second channel rotating transition RF sockets respectively, the sleeve is embedded with the rotating transition step shaft, and the first and second channels are integrated in the The radial stacking method, the integration of the third channel and the first to the second channel adopts the axial stacking method, and the three channels are structurally independent and modularly integrated.

Description

technical field [0001] The invention is suitable for electronic equipment such as modern radars, and belongs to the technical field of radar antennas and microwaves. Background technique [0002] When the radar antenna rotates in all directions, the rotating end and the fixed end of the rotating hinge rotate relatively, and the rotating hinge can normally transmit radar signals. With the expansion of radar functions, the requirements for rotary hinges are getting higher and higher, with high operating frequency, wide frequency band and large number of integrated channels. [0003] The three-channel broadband coaxial rotary hinge involved in the present invention can be used for passive broadband detection antennas. The three channels are all receiving channels. The third channel requires a working frequency of 4GHz and a frequency band of DC to 4GHz. The first and second channels require working Frequency up to 8GHz, frequency band DC ~ 8GHz. For the first channel coaxial ...

AI Technical Summary

Problems solved by technology

For the first channel coaxial rotary hinge, for example, the overall structural design of the existing first channel rotary end coaxial line and the first channel rotary transition radio frequency socket and the first channel fixed end coaxial line and the first channel fixed end radio frequency socket are adopted. The signal transmission and coupling conversion between the rotating end and the fixed end of the first channel coaxial rotary hinge, the processing and assembly of the rotating end and the fixed end of the first channel coaxial rotary hinge are difficult, and do not meet the high operating frequency and broadband of the first channel coaxial rotary hinge With requirements, the signal transmission and coupling conversion between the rotating end and the fixed end of the second and third channel coaxial rotary hinge adopt the transmission described in the patent "A Realization Method of Broadband Stackable Coaxial Rotary Hinge" (ZL201410707111.6) Ring contact coupling conversion structure, the present invention does not elaborate on its design technology, in which the third channel is connected to the fourth cavity embedded in the second flange with the coaxial rotary hinge sleeve, and the transmission ring is embedded in the clamping sleeve The medium sleeve on the barrel, the second flange at the rotating end of the rotary hinge and the first flange at the fixed end rotate relatively, the sleeve penetrates the first flange, and for the second channel coaxial rotary hinge, clamp the medium sleeve If the sleeve adopts the overall structural design of the existing third channel coaxial rotary hinge sleeve, the first channel RF cable must pass through the sleeve through hole of the second channel clamping dielectric sleeve, so that the second channel coaxial rotary hinge cavity The axial and radial space size is large, which does not meet the high operating frequency and broadband requirements of the second channel. If the existing first and second channel coaxial rotary hinge design is used to realize the three-channel broadband coaxial rotary hinge, the first and second channel The two-channel integration can only be stacked in the axial direction, and the miniaturization and integration of the three-channel broadband coaxial rotary hinge is difficult and has low reliability.

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