End pressure type coaxial load

Abstract

The invention discloses an end pressure type coaxial load. The end pressure type coaxial load comprises a cylindrical resistor, a compressed spring, an inner conductor, an insulating medium and an outer conductor which are coaxially arranged, as well as an end face shaft sleeve, wherein a compressed spring and a resistor hole are formed in the tail of the inner conductor; the cylindrical resistor is cylindrical; the two ends of the cylindrical resistor are sintered with silver resistors, and the other part of the cylindrical resistor is sintered with a thick-film resistor; the insulating medium is of a circle structure; the single side of the insulating medium is cut off through a seamless cutting technology, and impedance compensation rings are arranged on the both sides; the end face shaft sleeve is positioned at the top part of the outer conductor, used for positioning the insulating medium, the inner conductor and the cylindrical resistor, and meanwhile participates in transmission of electrical performance; cooling fins are arranged on the outer periphery of the outer conductor; a coaxial step type conical transmission cavity is defined inside the outer conductor. The end pressure type coaxial load disclosed by the invention is simple in structure, stable and reliable in properties, high in signal transmission efficiency, high in working frequency band, simple to assemble, easy to operate, and suitable for large batch production.

Description

technical field [0001] The invention relates to an end pressure coaxial load. Background technique [0002] Currently, threaded installation structures are used for microwave loads, such as figure 2 As shown, the resistor 7 is installed in the hole at the tail of the pin 8, the large insulator 9 and the small insulator 10 are respectively installed on the pin 8, and then they are installed together in the cavity 101, and the shell 102 is fixed to the On the external thread of the cavity 101; this structure has four major disadvantages: first, the power is small, easy to overload, the cavity 101 is not provided with heat dissipation fins, and the resistance 7 is easy to generate heat when used, which cannot be discharged in time, and it is used for a long time Cause the product to ignite, burn out, and be scrapped; its electrical performance is poor, and its working frequency band is low. The transmission efficiency of the product is extremely low, and the double-extreme st...

AI Technical Summary

Problems solved by technology

[0002] Currently, threaded installation structures are used for microwave loads, such as figure 2 As shown, the resistor 7 is installed in the hole at the tail of the pin 8, the large insulator 9 and the small insulator 10 are respectively installed on the pin 8, and then they are installed together in the cavity 101, and the shell 102 is fixed to the On the external thread of the cavity 101; this structure has four major disadvantages: first, the power is small, easy to overload, the cavity 101 is not provided with heat dissipation fins, and the resistance 7 is easy to generate heat when used, which cannot be discharged in time, and it is used for a long time Cause the product to ignite, burn out, and be scrapped; its electrical performance is poor, and its working frequency band is low. The transmission efficiency of the product is extremely low, and the double-extreme structure increases the transmission distance of the signal in the solid medium. Due to the principle that the longer the transmission distance of the signal in the insulator, the lower the working frequency band, the product's use frequency band is very low; the third is stable Poor performance, although there is an opening at the tail of the pin 8, it has not been slotted and closed, resulting in poor contact between the resistor 7 and the pin 8, and at the same time, no guarantee is taken at the tail of the pin 8 to ensure that the resistor 7 and the cavity 101 are connected for a long time Using measures that can still make good contact, only relying on the thrust between the large insulator 9 and the pin 8, long-term high-temperature use will inevitably lead to deformation of the large insulator 9 and loss of force, so that the resistor 7 and the cavity 101 cannot be well connected. contact, resulting in poor contact; fourthly, the assembly efficiency is low and the consistency is poor. After one-time assembly of the microwave load of this structure, due to poor contact and large standing wave ratio, it is necessary to carry out secondary debugging and assembly. At the same time, the thread The screw-on structure cannot be compared with the structural efficiency of the press-fit type

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