System for testing antenna performance

Patent metadata

Field	Value
Publication number	US-12196796-B2
Application number	US-202118013834-A
Country	US
Kind code	B2
Filing date	Jun 30, 2021
Priority date	Jun 30, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

In a system for testing antenna performance, antenna performance is tested by reflecting the loss of a cable used in the antenna performance test. The system for testing antenna performance includes a tester having a test port, the test port being connected, via a cable, to an antenna that communicates with a terminal to be tested, in a shield box, when a test mode is set, wherein the tester outputs a test signal to the test port, receives a response signal corresponding to the test signal via the test port, and obtains a value, as a communication performance measurement value, by adding a calibration value to a reception signal strength of the response signal.

First claim

The invention claimed is:

1. A system for testing antenna performance, comprising:
a tester including a test port, the test port being connected, via a cable, to an antenna that communicates with a terminal to be tested, in a shield box, when a test mode is set; and
a signal generator including an output port and outputting a reference signal having a reference signal strength to the output port,
wherein the tester outputs a test signal to the test port, receives a response signal corresponding to the test signal via the test port, and calculates a value obtained by adding a calibration value to a received signal strength of the response signal as a communication performance measurement value, and
wherein the tester further includes a calibration port connected to the output port via the cable when a calibration mode is set, and sets the calibration value based on the reference signal strength and a received signal strength of the reference signal input to the calibration port when the calibration mode is set.

2. The system for testing antenna performance of claim 1 , wherein the tester calculates a difference value between the reference signal strength and the received signal strength as a loss value of the cable and sets the loss value as the calibration value.

3. The system for testing antenna performance of claim 1 , wherein the tester further includes a test port connected to a calibration port via the cable in a self-diagnosis mode, and
the tester generates a value obtained by subtracting, from a signal strength of a self-diagnosis signal output via the test port, a received signal strength of the self-diagnosis signal received via the calibration port, as a self-diagnosis result.

4. The system for testing antenna performance of claim 1 , wherein the tester includes:
a signal processing element measuring a received signal strength of a reference signal input via a receiving terminal when a calibration mode is set; and
a microcontroller connected to the signal processing element, calculating a difference between the received signal strength measured by the signal processing element and a reference signal strength as a loss value of the cable, and setting the loss value as the calibration value.

5. The system for testing antenna performance of claim 4 , wherein the signal processing element outputs a test signal to an output terminal when the test mode is set, receives a response signal corresponding to the test signal via a receiving terminal different from the receiving terminal, and measures a received signal strength of the response signal, and
the microcontroller sets a value obtained by adding the calibration value to the received signal strength measured by the signal processing element as a communication performance measurement value.

6. The system for testing antenna performance of claim 5 , wherein the tester further includes:
a test port connected, via the cable, to the antenna that communicates with the terminal to be tested, in the shield box, when the test mode is set, outputting the test signal from the output terminal of the signal processing element to the antenna, and receives the response signal corresponding to the test signal from the antenna; and
a switch switching to the different receiving terminal to connect the test port and the different receiving terminal to each other and outputting the response signal input to the test port to the different receiving terminal.

7. The system for testing antenna performance of claim 1 , wherein the tester includes:
a signal processing element including an output terminal and a receiving terminal, outputting a self-diagnosis signal having a reference signal strength to the output terminal when a self-diagnosis mode is set, and measuring a received signal strength of a received signal received through the receiving terminal; and
a microcontroller generating a tester abnormality alarm based on the received signal strength.

8. The system for testing antenna performance of claim 7 , wherein the microcontroller determines that the tester is abnormal and generates the tester abnormality alarm, when the received signal strength is out of an error range of a self-diagnosis reference value.

9. The system for testing antenna performance of claim 7 , wherein the receiving terminal includes a first receiving terminal and a second receiving terminal, and
the tester further includes a switch switching the output terminal to one of the first receiving terminal and the second receiving terminal.

Assignees

• Amosense Co Ltd

Inventors

• Seok Wonjin
• Baek Hyungil
• Ryu Kyunghyun
• Lee Chanwoo
• Kim Jungryul

Classifications

• G01R35/007

  Standards or reference devices, e.g. voltage or resistance standards, "golden references" · CPC title

• G01R29/0892

  Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value · CPC title

• G01R29/0878

  Sensors; antennas; probes; detectors (wave guide measuring sections G01R1/24) · CPC title

• G08B21/185

  Electrical failure alarms · CPC title

• G01R23/005

  Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing phase or frequency of 2 mutually independent oscillations in demodulators) · CPC title