JPH0677312U - Track constant measurement jig - Google Patents

Abstract

(57) [Summary] [Purpose] To perform measurement efficiently. [Structure] In a measurement jig for measuring a line constant using a triplate line resonator, a gap serving as a coupling portion for forming the triplate line resonator is provided with a signal input / output terminal and a triplate line end. Be configured between.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for measuring the characteristics of a high frequency substrate material.

As a conventional method of measuring the line constant of a high-frequency material, there are a ring resonator method for measuring the permittivity ε _r and a cylindrical cavity method for measuring the dielectric loss tangent tan δ. Also, in the "Precise Measurements of Dissipation Factor in Micr-owave Prited Circuit Boards" (written by HIROYUKI TANAKA, FUMIAKI OKADA) published in IEEE TRANS-ACTIONS ON INSTRUMENTATION AND MEASUREMENT, VOL. 38, NO.2, APRIL 1989, Triplate A method of measuring the above two constants using a linear line resonator having a structure is disclosed.

[0003]

[Problems to be solved by the device]

In the cylindrical cavity method, the cylindrical cavity itself must be manufactured for each measurement frequency, the manufacturing cost and the labor of measurement are great, and only the dielectric loss tangent tanδ can be measured. With the ring resonator method, it is possible to measure at the fundamental resonance frequency and a frequency that is an integral multiple of it, and it is relatively easy to fabricate the measurement sample and measurement jig, but only the relative permittivity ε _r can be measured. A separate method for measuring the dielectric loss tangent tan δ is required. On the other hand, the method reported by “Tanaka and Okada” above is a method that can measure both tan δ and equivalent conductivity σ eff with a simple measurement sample. Since it is necessary to provide a gap, one measurement sample cannot be measured while changing the fundamental resonance frequency. Moreover, it is difficult to connect the triplate line to the outside, and there is a risk that unwanted propagation modes will occur.

The present invention relates to a measuring jig for efficiently performing measurement.

[0005]

[Means for Solving the Problems]

 The measuring jig of the present invention is a measuring jig for measuring a line constant by using a triplate line resonator, and a gap serving as a coupling portion for forming the triplate line resonator is connected to a signal input / output. The feature is that it is configured between the terminal and the end of the triplate line.

[0006]

【Example】

 As shown in FIG. 1, the measuring jig according to the present invention comprises connectors 1a and 1b which are connection points with a measuring machine such as a vector network analyzer, and a connector base metal fitting 2a which is a base for fixing the connector. 2b and the circuit board coupling metal fittings 3a, 3b for fixing the circuit board 5 which is coupled to the connector base metal fittings 2a, 2b and forms the triplate line resonator to be measured to the connector 1a, 1b. In the measurement jig including 3c and 3d and the circuit board press-fitting metal fittings 4a and 4b for applying pressure from both sides and closely adhering the circuit board 5 forming the triplate line resonator to be measured, the connector A fixed gap is provided between 1a and 1b and the circuit board 5 forming the triplate line resonator to be measured, and this gap is used as a gap. The operation of the measuring jig according to the present invention will be described below. The connectors 1a and 1b are fixed to connector base metal fittings 2a and 2b, respectively, which are bases for fixing the connectors. Measuring instruments such as vector network analyzers are connected to connectors 1a and 1b. FIG. 2 shows an enlarged view of this portion. The core wires of the connectors 1a and 1b are not directly connected to the triplate line of the circuit board 5, but are capacitively coupled through a space having a certain distance. Further, the circuit board coupling fittings 3a, 3b, 3c, 3d are pressed from both ground planes of the circuit board 5 to be in close contact with each other, and are also closely adhered to the connector base metal fittings 2a, 2b, so that the ground plane copper foil of the circuit board 5 is made. The connection between the connector 1a and 1b fixed to the connector base metal fittings 2a and 2b and the grounding portion is ensured. The circuit board press-fitting metal fittings 4a and 4b are pressed from both ground planes of the circuit board 5 to be in close contact with each other. In this case, it is better that the distance between the circuit board connecting metal fittings 3a, 3b, 3c, 3d and the circuit board pressure welding metal fittings 4a, 4b is as small as possible, and in some cases, the circuit board connecting metal fittings 3a, 3c and the circuit board pressure welding metal fitting 4a, a screw. The path board connecting fittings 3b and 3d and the circuit board pressure contact fitting 4b may be integrated respectively. According to the method described above, the measuring jig according to the present invention includes the connectors 1a and 1b, the connector base metal fittings 2a and 2b, the circuit board coupling metal fittings 3a, 3b, 3c and 3d, and the circuit board pressure fittings 4a and 4b. To solve the problem. That is, since the connectors 1a and 1b are not directly connected to the triplate line resonator of the circuit board 5 but are capacitively coupled through a space having a certain distance, by using this space as a gap, There is no need to provide a gap on the triplate line, and when measuring a triplate line resonator of any line length, if it is longer than the length of the circuit board coupling fittings 3a, 3b, 3c, 3d, This can be dealt with by replacing the circuit board press-fitting metal fittings 4a and 4b with those having an appropriate length. In addition, it is not necessary to make a gap on the line when making a triplate line resonator of arbitrary line length, so it can be easily made. For example, make one measurement sample long and then slightly If the measurement is performed while cutting each piece (changing the fundamental resonance frequency), the time and effort required for sample preparation can be simplified.

[0007]

[Effect of device]

 As described above, this measurement jig provides an efficient measurement jig for the measurement method that can simultaneously measure the equivalent conductivity σ eff and the dielectric loss tangent tan δ of the line constants of high-frequency materials. Yes, it is possible to perform measurements while modifying one measurement sample without recreating the measurement sample many times, and it is easy to connect the triplate line resonator, which is difficult to connect to the outside, to the measurement machine. It was made possible.

[Brief description of drawings]

FIG. 1A is a perspective top view showing an embodiment of the present invention, and FIG. 1B is a perspective side view thereof.

FIG. 2 is a perspective top view of an essential part showing an embodiment of the present invention.

[Explanation of symbols]

 1. Connector 2. Connector base fitting 3. Circuit board fittings 4. Circuit board pressure welding metal fittings 5. Circuit board

Claims (1)

[Scope of utility model registration request] 1. A measuring jig for measuring a line constant using a triplate line resonator, wherein a gap serving as a coupling portion for forming the triplate line resonator is provided.
A measuring jig characterized by being configured between a signal input / output terminal and a triplate line end.