A rapid test end-face probe for radio frequency coaxial cables

Abstract

The present invention belongs to the technical field of cable testing, and relates to a rapid testing end face probe for a radio frequency coaxial cable, which includes a base electrically connected to a testing cable. The base is divided into a base inner conductor, a base dielectric layer coaxially wrapped outside the base inner conductor, and a base outer conductor coaxially wrapped outside the base dielectric layer. The front end of the base inner conductor is conducted with a frustum-shaped probe inner conductor, and the front end of the base outer conductor is conducted with an annular probe outer conductor. The probe inner conductor and the probe outer conductor are coaxial, have the same length, and use air as the medium. This rapid testing end face probe for a radio frequency coaxial cable can quickly measure various performances of the radio frequency coaxial cable, and the parts can be reused, saving the connector scrapping cost and the time cost of installing the connector for testing after installing and adapting the connector.

Description

Technical Field

[0001] The present invention relates to the technical field of cable testing, and particularly to a rapid test end face probe for a radio frequency coaxial cable. Background Art

[0002] When electrical performance measurements are required for a radio frequency coaxial cable, such as return loss, insertion loss, voltage standing wave ratio, propagation rate, characteristic impedance, capacitance, phase, etc., the radio frequency coaxial cable needs to be processed accordingly before testing.

[0003] For existing radio frequency coaxial cables, when measuring parameters such as characteristic impedance, propagation rate, capacitance, phase, etc., a suitable radio frequency coaxial connector needs to be installed at the end of the cable, and then it can be connected to the measurement port of the instrument for testing. The mating of the radio frequency coaxial connector is very troublesome, taking a long time, with low efficiency, high technical requirements, and the radio frequency coaxial connector has to be scrapped after testing, resulting in high testing costs.

[0004] Therefore, it is necessary to provide a new testing device to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a rapid test end face probe for a radio frequency coaxial cable, which can conveniently, time - savingly and cost - savingly test the radio frequency coaxial cable.

[0006] The present invention realizes the above object through the following technical solutions: A rapid test end face probe for a radio frequency coaxial cable includes a base electrically connected to a test cable. The base is divided into a base inner conductor, a base dielectric layer coaxially wrapped outside the base inner conductor, and a base outer conductor coaxially wrapped outside the base dielectric layer. The front end of the base inner conductor is conducted with a frustum - shaped probe inner conductor, and the front end of the base outer conductor is conducted with an annular - shaped probe outer conductor. The probe inner conductor and the probe outer conductor are coaxial, have the same length, and use air as the medium. A pit for installing an inner magnet is provided at the outer end of the base inner conductor, and the inner magnet attracts the probe inner conductor. An annular groove is provided at the outer end of the base outer conductor, and an outer magnet for attracting the probe outer conductor is provided in the annular groove. The working characteristic impedance of the base is the same as the characteristic impedance of the coaxial structure composed of the probe inner conductor and the probe outer conductor.

[0007] Specifically, the base tapers and expands from one end of the test cable to the other end.

[0008] Specifically, an inner conductor stab pin is provided at the center of the front end of the probe inner conductor.

[0009] Furthermore, a plurality of outer conductor stab pins are provided on the annular surface of the front end of the probe outer conductor.

[0010] The beneficial effects of adopting the above technical solutions are as follows:

[0011] This rapid test end-face probe for radio frequency coaxial cables can conveniently measure various performance of radio frequency coaxial cables, and the parts can be reused, saving the connector scrapping cost and the time cost of installing the connector for testing after installing the adapter connector. Description of the Drawings

[0012] Figure 1 It is the disassembly drawing of the rapid test end-face probe in Embodiment 1;

[0013] Figure 2 It is Figure 1 the A-A cross-sectional view in

[0014] Figure 3 It is Figure 1 the partial enlarged view at position B in

[0015] Figure 4 It is Figure 1 the partial enlarged view at position C in

[0016] Figure 5 It is the schematic diagram of the rapid test end-face probe in Embodiment 1 in the test state;

[0017] Figure 6 It is the partial cross-sectional view of the rapid test end-face probe in Embodiment 2;

[0018] Figure 7 It is the partial cross-sectional view of the rapid test end-face probe in Embodiment 3.

[0019] The numbers in the figures represent:

[0020] 1 - base, 11 - inner conductor of the base, 111 - pit, 12 - dielectric layer of the base, 13 - outer conductor of the base, 131 - annular groove, 14 - inner magnet, 15 - outer magnet;

[0021] 2 - test cable;

[0022] 3a - large inner conductor of the probe, 3b - medium inner conductor of the probe, 3c - small inner conductor of the probe, 31 - inner conductor stinger;

[0023] 4a - large outer conductor of the probe, 4b - medium outer conductor of the probe, 4c - small outer conductor of the probe, 41 - outer conductor stinger;

[0024] 51 - inner conductor of the cable, 52 - dielectric layer of the cable, 53 - outer conductor of the cable. Detailed Description of the Specific Embodiment

[0025] The present invention will be further described in detail below in conjunction with specific embodiments.

[0026] Example 1: Radio frequency coaxial cable with a diameter larger than the test cable

[0027] As Figure 1 and Figure 5 shown, the present invention is a rapid test end face probe for a radio frequency coaxial cable, including a base 1 electrically connected to a test cable 2. The base 1 is divided into a base inner conductor 11, a base dielectric layer 12 coaxially wrapped outside the base inner conductor 11, and a base outer conductor 13 coaxially wrapped outside the base dielectric layer 12. The front end of the base inner conductor 11 is conducted with a frustum-shaped probe inner conductor 3a, and the front end of the base outer conductor 13 is conducted with an annular probe outer conductor 4a. The probe inner conductor 3a and the probe outer conductor 4a are in a coaxial state, have the same length, and use air as the medium. In actual measurement, the radio frequency coaxial cable to be measured is cut along the direction perpendicular to the axis, so that the cable inner conductor 51 and the cable outer conductor 53 are flush. As long as the base 1 contacts the cable outer conductor 53 by the probe outer conductor 4a and the probe inner conductor 3a contacts the cable inner conductor 51 to form a conductive loop, the tests of parameters such as characteristic impedance, propagation rate, capacitance, and phase can be started. This process only requires two steps and does not require the use of a mating radio frequency coaxial connector. Moreover, after the measurement, the base 1, the probe inner conductor 3a, and the probe outer conductor 4a can all be reused, saving the connector scrapping cost and the time cost of installing the connector after installing the mating connector for testing.

[0028] As Figure 1 and Figure 5 shown, the base 1 tapers from one end of the test cable to the other end. The purpose of such a structure is that the characteristic impedance of the base and the probe is the same everywhere, greatly reducing the test error caused by impedance mismatch.

[0029] As Figure 1 , Figure 2 and Figure 5 shown, a pit 111 for installing an inner magnet 14 is provided at the outer end of the base inner conductor 11, and the inner magnet 14 attracts the probe inner conductor 3a. An annular groove 131 is provided at the outer end of the base outer conductor 13, and an outer magnet 15 for attracting the probe outer conductor 4a is provided in the annular groove 131. The probe inner conductor 3a and the probe outer conductor 4a are both replaceable structures. During the test, the inner magnet 14 and the outer magnet 15 can attract the probe inner conductor 3a and the probe outer conductor 4a to prevent them from falling, and at the same time facilitate the replacement of test probes of other sizes to ensure the electrical connection during the test.

[0030] As Figures 3 to 5As shown in the figure, a conductor pin 31 is provided at the center of the front end of the inner conductor 3a of the probe, and a number of outer conductor pins 41 are provided on the annular surface at the front end of the outer conductor 4a of the probe. During testing, the inner conductor pin 31 can penetrate into the inner conductor 51 of the cable, and the outer conductor pin 41 can also penetrate into the outer conductor 53 of the cable, so as to ensure the conductivity during face-to-face contact and avoid the problem of inaccurate impedance measurement caused by poor contact.

[0031] Embodiment 2: A radio frequency coaxial cable with a diameter equal to that of the test cable

[0032] As Figure 6 shown, the difference from Embodiment 1 is that when measuring a large-diameter radio frequency coaxial cable, the inner conductor 3a of the probe is a frustum structure with a thick outer and a thin inner shape, and the outer conductor 4a of the probe is a flared structure with an outward expansion; when measuring a medium-diameter radio frequency coaxial cable, the inner conductor 3b of the probe is a frustum structure with a thick inner and a thin outer shape, and the outer conductor 4b of the probe is a flared structure with an inward contraction. This can match the inner and outer conductor structures of radio frequency coaxial cables of different model sizes. It only needs to replace the test probe without replacing the test base.

[0033] Embodiment 3: A radio frequency coaxial cable with a diameter smaller than that of the test cable

[0034] As Figure 7 shown, the difference from Embodiment 2 is that in order to adapt to the small-diameter radio frequency coaxial cable, the external structures of the inner conductor 3b and the outer conductor 4b of the probe are further reduced.

[0035] The working impedance of the base 1 is equal to the characteristic impedance of the coaxial structure formed by the inner conductors 3a / 3b / 3c and the outer conductors 4a / 4b / 4c of the probe. In this way, no matter which inner conductors 3a / 3b / 3c and outer conductors 4a / 4b / 4c of the probe are replaced as a set, the characteristic impedance is constant, so that no redundant debugging is required for measurement, ensuring the accuracy of the results.

[0036] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A rapid test end face probe for a radio frequency coaxial cable, characterized in that: It includes a base electrically connected to a test cable. The base is divided into a base inner conductor, a base dielectric layer coaxially wrapped outside the base inner conductor, and a base outer conductor coaxially wrapped outside the base dielectric layer. The front end of the base inner conductor is electrically connected to a probe inner conductor in a frustum shape. The front end of the base outer conductor is electrically connected to a probe outer conductor in an annular structure. The probe inner conductor and the probe outer conductor are coaxial, have the same length, and use air as the medium. A pit for installing an inner magnet is provided at the outer end of the base inner conductor, and the inner magnet attracts the probe inner conductor. An annular groove is provided at the outer end of the base outer conductor, and an outer magnet for attracting the probe outer conductor is provided in the annular groove. The characteristic impedance of the base is the same as that of the coaxial structure composed of the probe inner conductor and the probe outer conductor.

2. The quick test end face probe for a radio frequency coaxial cable according to claim 1, wherein: The base tapers from one end of the test cable to the other end.

3. The radio frequency coaxial cable rapid test end face probe according to claim 1, characterized in that: An inner conductor needle is provided at the center of the front end of the probe inner conductor.

4. The rapid test end face probe for radio frequency coaxial cable according to claim 3, characterized in that: A number of outer conductor needles are provided on the annular surface of the front end of the probe outer conductor.

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