CN205160550U - A multi-port test device - Google Patents

Abstract

The utility model provides a multiport testing arrangement contains parallel port end, switch matrix control circuit, radio frequency switch matrix, power module, port connector, parallel port end and switch matrix control circuit's input link to each other, switch matrix control circuit's output links to each other with radio frequency switch matrix's control end to the switch opening -closing that the controlling radio frequency switch matrix corresponds, radio frequency switch matrix constitute by a plurality of single -pole double throw's electron RF switch, radio frequency switch matrix's output, input correspond the connection port connector respectively, power module provide switch matrix control circuit and the required power consumption of radio frequency switch matrix. The utility model has the advantages of: expand vector network analyzer's port, improved the efficiency to the test of many RF port device, use CPLD does the control of electron RF switch, and is fast, and the synchronous output of all control signal can be realized to full parallel output, guarantees the synchronous handover of switch.

Description

A multi-port test device

technical field

The utility model relates to the field of testing, in particular to the field of high-frequency testing devices.

Background technique

Existing vector network analyzers or test instruments generally have 2 ports. To test the transmission and reflection characteristics of multiple RF port devices, only the parameters of 2 ports of the device can be tested at a time, and other ports that cannot be connected to the vector network analyzer port The ports of devices with multiple RF ports can only be matched with loads, so the test requires the user to change the test cables and terminate the loads between the ports of the device under test multiple times until the test of all port parameters is completed, and the test speed is slow. The efficiency is low, and the test consumes a lot of manpower and material resources, which is not conducive to the needs of modern testing.

The patent application with application number 201020504581 discloses a vector network analyzer time-division multiplexing expansion port device. Its control unit adopts the mode of MCU combined with triode drive, which requires many components and is limited by the frequency of the MCU crystal oscillator. Slow, can not guarantee the synchronous switching of the switch, and the number of expansion ports is small.

Utility model content

The purpose of the utility model is to solve the problem that the vector network analyzer has few test ports and it is difficult to test devices with multiple RF ports.

The utility model proposes a multi-port testing device, which includes a parallel port, a switch matrix control circuit, a radio frequency switch matrix, a power supply module, and a port connector; the parallel port is connected to the input of the switch matrix control circuit, and the switch matrix control circuit The output of the radio frequency switch matrix is connected with the control terminal to control the switch opening and closing corresponding to the radio frequency switch matrix; connector; the power supply module provides the power required by the switch matrix control circuit and the radio frequency switch matrix.

Further, the radio frequency switch matrix includes two sets of 1-point 12-way switch matrices and twelve groups of 1-point 3-way switch matrices; one of the 3 branches of the 1-point 3-way switch matrix is connected to the ground, The remaining two branches are respectively connected to one of the twelve branches of the two groups of 1-point 12-way switch matrix, and the branched one is connected to the port connector; the branched one of the two groups of 1-point 12-way switch matrix The two paths are respectively connected to the port connectors.

Further, the switch matrix control circuit includes a CPLD, the parallel port is connected to the input of the CPLD, and the output of the CPLD is connected to the control terminal of the radio frequency switch matrix.

Further, it also includes a port connection indicator, and the port connection indicator is connected to the output of the CPLD.

Further, it also includes a power switch; the power switch is connected to the input of the power module.

Further, the power supply module includes a 100-240V wide-voltage switching power supply module.

Further, the single-pole double-throw electronic radio frequency switch includes HMC284.

The working principle of the utility model is: the command input by the parallel port communication is sent to the switch matrix control circuit, such as CPLD, and then the output of the switch matrix control circuit (such as CPLD) sends a signal to the control terminal of the radio frequency switch matrix to control the corresponding electronic The radio frequency switch is turned on and off, so as to achieve the purpose of controlling port connection switching through parallel port communication.

The beneficial effects of the utility model are:

(1) The port of the vector network analyzer is expanded, and the efficiency of testing multi-RF port devices is improved;

⑵Using CPLD to control the electronic radio frequency switch, with fast speed and full parallel output, can realize the synchronous output of all control signals and ensure the synchronous switching of the switch;

(3) Each test port has an independent port control output, which can be used to control the external expansion module and realize the synchronous control of the external expansion module.

Description of drawings

Accompanying drawing 1 is the hardware block diagram of the present utility model.

Accompanying drawing 2 is the connection diagram of radio frequency matrix switch.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example 1

A kind of multi-port testing device has parallel port, power switch, port connection indicator light, switch matrix control circuit, radio frequency switch matrix, power supply module, port connector as shown in accompanying drawing 1; Described parallel port and switch matrix control The input of the circuit is connected, and the output of the switch matrix control circuit is connected with the control end of the radio frequency switch matrix to control the opening and closing of the corresponding switch of the radio frequency switch matrix; the radio frequency switch matrix is composed of several single-pole double throw electronic radio frequency switches. The output and input of the matrix are respectively connected to port connectors; the port connection indicator is connected to the output of the switch matrix control circuit; the power switch is connected to the input of the power module; the power module includes 100-240V wide Voltage switching power supply module, which provides the power required by the switch matrix control circuit, radio frequency switch matrix and port connection indicators.

As shown in accompanying drawing 2, the radio frequency switch matrix includes two groups of 1-point 12-way switch matrices and twelve groups of 1-point 3-way switch matrices; one of the 3 branches of the 1-point 3-way switch matrix is connected to the ground, The remaining two branches are respectively connected to one of the twelve branches of the two groups of 1-point 12-way switch matrices, and the branched one is connected to the port connector; the two branches of the two groups of 1-point 12-way switch matrix are branched. The circuits are respectively connected to the port connectors.

Preferably, the switch matrix control circuit includes a CPLD, the parallel port is connected to the input of the CPLD, and the output of the CPLD is connected to the control terminal of the radio frequency switch matrix.

Preferably, the single pole double throw electronic radio frequency switch comprises HMC284.

The working principle of this embodiment is: the command input by the parallel port communication is sent to the switch matrix control circuit, such as CPLD, then the switch matrix control circuit sends a signal to the control end of the radio frequency switch matrix (that is, the control of each electronic radio frequency switch corresponding Terminal), control the corresponding electronic radio frequency switch to turn on and off, so as to achieve the purpose of controlling port connection switching through parallel port communication.

The beneficial effects of this embodiment are:

(1) The port of the vector network analyzer is expanded, and the efficiency of testing multi-RF port devices is improved;

⑵Using CPLD to control the electronic radio frequency switch, with fast speed and full parallel output, can realize the synchronous output of all control signals and ensure the synchronous switching of the switch;

(3) Each test port has an independent port control output, which can be used to control the external expansion module and realize the synchronous control of the external expansion module.

The above is only a preferred embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model, All should be included within the protection scope of the present utility model.

Claims (8)

1. a multiport testing apparatus, is characterized in that: comprise parallel port end, switch matrix control circuit, radio-frequency (RF) switch matrix, power module, port connector; Described parallel port end is connected with the input of switch matrix control circuit, and the output of switch matrix control circuit is connected with the control end of radio-frequency (RF) switch matrix, closes to control switch open corresponding to radio-frequency (RF) switch matrix; Described radio-frequency (RF) switch matrix is made up of the electronic radio-frequency switch of some single-pole double throws, and output, the input of radio-frequency (RF) switch matrix are connected respectively port connector; Described power module provides electricity consumption needed for switch matrix control circuit and radio-frequency (RF) switch matrix.

2. a kind of multiport testing apparatus according to claim 1, is characterized in that: described radio-frequency (RF) switch matrix comprises two groups 1 point 12 way switch matrixes and 12 groups 1 point 3 way switch matrixes; A wherein road of 3 branch roads of 1 point of 3 described way switch matrix connects with ground, and all the other two branch roads connect with a wherein road on the twelve earthly branches road of two groups 1 point 12 way switch matrixes respectively, and the road be branched is connected with port connector; The two-way that two groups 1 point described 12 way switch matrixes are branched is connected with port connector respectively.

3. a kind of multiport testing apparatus according to claim 1 and 2, it is characterized in that: described switch matrix control circuit comprises CPLD, described parallel port end is connected with the input of CPLD, and the output of CPLD is connected with the control end of radio-frequency (RF) switch matrix.

4. a kind of multiport testing apparatus according to claim 1 and 2, is characterized in that: also comprise port and connect indicator light, described port connects indicator light and is connected with the output of CPLD.

5. a kind of multiport testing apparatus according to claim 1 and 2, is characterized in that: also comprise mains switch; Described mains switch is connected with the input of power module.

6. a kind of multiport testing apparatus according to claim 1 and 2, is characterized in that: described power module comprises the wide power module that compresses switch of 100 ~ 240V.

7. a kind of multiport testing apparatus according to claim 1 and 2, is characterized in that: the electronic radio-frequency switch of described single-pole double throw comprises HMC284.

8. a kind of multiport testing apparatus according to claim 4, is characterized in that: also comprise mains switch; Described mains switch is connected with the input of power module.