Dielectric phase shifter with novel conducting cavities

Abstract

The invention discloses a dielectric phase shifter with novel conducting cavities. The dielectric phase shifter includes an outer shell, dielectric sheets, a circuit board and coaxial cables; two rectangular cavities are formed in the outer shell; one conducting cavity is formed at one side of each cavity, wherein the conducting cavity is connected with the cavity; each conducting cavity is hollow and is a circular hole of which the diameter is 3.6 mm, and a small groove of which the width is 1.2 mm formed at one side of the hole; in each conducting cavity 4, a portion with a reserved width is maintained to be original at a position where the outer conductor of a corresponding coaxial cable is welded to the conducting cavity 4, and a portion of which the width is 15mm is machined downwards so as to be removed, and therefore, the coaxial cable can extend into the conducting cavity so as to be welded to the conducting cavity; the circuit board is designed into a rectangle with four grooves formed at one side; and the four grooves are corresponding to the edges of circuit board pads for welding the inner conductors of the coaxial cables. When welding is carried out, only one-time clamping is required, and therefore, a welding technique is better, and the economical efficiency of welding is improved; and the conducting cavities are utilized to excellently wrap the outer conductors of the coaxial cables, distortion can be avoided, bending stress of the coaxial cables can be avoided, the risk that welding spots and the circuit board are damaged can be lowered, and hidden hazard points in intermodulation can be decreased.

Description

technical field [0001] The invention relates to the field of base station antennas for mobile communications, in particular to the field of phase shifters for base station antennas, in particular to a novel dielectric phase shifter for conductive cavities. Background technique [0002] In a wireless communication system, the base station antenna is the interface between the transceiver and the external propagation medium. With the development of wireless communication, the complex and changeable network environment and the shortage of site and steel structure communication tower platform resources, the requirements for base station antennas are usually higher. The electronically adjustable antenna can realize the continuous adjustment of the downtilt angle of the vertical beam, and the network coverage is more flexible. The beam inclination angle of the electronically adjustable antenna can be changed through remote control as needed, and the coverage effect is better than ...

AI Technical Summary

Problems solved by technology

However, in the actual welding operation, due to the existence of the insulator and inner conductor bent at 90°, and the limitation of the circuit board in the length direction through the solder joints of the PCB pad, the slight swing of the coaxial cable and the slight displacement of the circuit board, It is easy to cause excessive stress on the inner conductor and the corresponding pad solder joint, resulting in deterioration of electrical indicators and intermodulation

In order to avoid excessive stress on the inner conductor and the solder joint of the corresponding PCB pad, the method of cutting and bending the insulator at 90° is adopted. Since the mechanized method cannot be adopted, the efficiency of manual cutting is low, and there are cuts on the inner conductor. superficial risk

It also creates a new point of deterioration for phase shifter intermodulation

[0008] Existing base station antenna design manufacturers: Due to design limitations, multiple external lines come out from both sides of the phase shifter, and the phase shifter shell needs to be processed and positioned multiple times, and processed by various processes such as milling and drilling, resulting in High cost and non-performing rate

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