208 results about "Rf testing" patented technology

A signal measurement system tests an RF component in an RF test facility, such as an RF anechoic chamber. The system includes a repeater which is connected to an exterior antenna disposed outside the chamber and a transmitting antenna disposed inside the chamber. The repeater receives the RF broadcast signal from the exterior antenna and rebroadcasts it as an RF testing signal inside the chamber. The subject antenna receives the RF testing signal, which is then analyzed with a computer. The repeater may also modify the RF testing signal to produce a wide variety of test situations that mimic those available in a traditional field-test.

An on-chip receiver sensitivity test mechanism for use in an integrated RF transmitter wherein the transmitter and the receiver share the same oscillator. The mechanism obviates the need to use expensive RF signal generator test equipment with built-in modulation capability and instead permits the use of very low cost external RF test equipment. The invention utilizes circuitry already existing in the transceiver, namely the modulation circuitry and local oscillator, to perform sensitivity testing. The on-chip LO is used to generate the modulated test signal that otherwise would need to be provided by expensive external RF test equipment with modulation capability. The modulated LO signal is mixed with an externally generated unmodulated CW RF signal to generate a modulated signal at IF which is subsequently processed by the remainder of the receiver chain. The recovered data bits are compared using an on-chip BER meter or counter and a BER reading is generated. The BER reading is used either externally or by an on-chip processor or controller to establish a pass / fail indication for the chip.

Methods, systems, and apparatuses for RFID devices, such as tag test methods, are described. A tag of a strip of tags is positioned adjacent to an opening in an electrically conductive sheet, the tag having first and second orthogonally polarized antennas. A first RF test signal is transmitted through the opening to test the first antenna of the tag. The tag is positioned such that the first RF test signal has a polarization substantially the same as the first antenna and substantially orthogonal to a polarization of the second antenna. A second RF test signal is transmitted through the opening to test the second antenna of the tag. The tag is positioned such that the second RF test signal has a polarization substantially the same as the second antenna and substantially orthogonal to the polarization of the first antenna. If proper responses to both of the first and second RF test signals are received, the tag has passed the test. This test may be repeated for further tags in the strip of tags as desired.

A signal measurement system tests an RF component in an RF test facility, such as an RF anechoic chamber. The system includes a repeater which is connected to an exterior antenna disposed outside the chamber and a transmitting antenna disposed inside the chamber. The repeater receives the RF broadcast signal from the exterior antenna and rebroadcasts it as an RF testing signal inside the chamber. The subject antenna receives the RF testing signal, which is then analyzed with a computer. The repeater may also modify the RF testing signal to produce a wide variety of test situations that mimic those available in a traditional field-test.

An integrated circuit (IC) is provided. The IC includes: an RF transmitter configured to generate an RF signal when the IC has entered a test mode; an RF receiver configured to receive the RF signal in the test mode; and a computation unit having a plurality of processing units that are parallelized to perform a test procedure of the IC according to the received RF signal to determine one or more test results.

A radio frequency testing system and its method of performing a radio frequency test on a plurality of mobile communication devices are provided. The system simultaneously connects mobile communication devices for performing a pre-set procedure and an RF test in sequence. The system has an RF testing device for RF-testing the mobile communication devices in turn, a switch device for regulating an electrical connection between the RF testing device and any mobile communication device, and a controlling device for performing the pre-set procedure on some of the rest mobile communication devices before the one is finished performing the RF test.

The invention discloses a line loss calibration method, device and system and a computer readable storage medium. The line loss calibration method comprises the steps of: when it is detected that theradio frequency test system is in a first connection state, controlling a first port of the wireless communication tester to transmit a first signal with first preset power, and obtaining first receiving power of the first signal received by the power meter; when detecting that the radio frequency test system is in a second connection state, controlling the first port of the wireless communicationtester to transmit a second signal with a second preset power, and obtaining a second receiving power of the second signal received by the second port of the wireless communication tester; and calculating to obtain a line loss compensation value according to the first preset power, the first receiving power, the second preset power and the second receiving power, and calibrating the radio frequency test system based on the line loss compensation value. According to the invention, the automatic test of the line loss compensation value and the automatic calibration of the radio frequency test system can be realized, and the calibration efficiency and the accuracy of the calibration result can be improved.

The invention discloses a verification test method and device for an ultrahigh-frequency RFID tag. The method comprises a tag chip radio frequency test step, and comprises the following steps: S1, configuring an adjustable attenuator and a reader, and respectively connecting two ends of the adjustable attenuator with a to-be-tested tag chip and the reader through coaxial transmission lines to construct a radio frequency test device; Ss2, adjusting the attenuation value of the adjustable attenuator and the output power of the reader to enable the to-be-measured label chip to work at the lowestpower, measuring the reflection coefficient of the to-be-measured label chip at the lowest power, and calculating the sensitivity value of the to-be-measured label chip according to the lowest power and the reflection coefficient; and adjusting the distance between the to-be-measured label chip and the reader to adjust the incident power of the to-be-measured label chip, and when the incident power reaches the calculated sensitivity value, measuring the input impedance of the current to-be-measured label chip. The method has and the device have the advantages of being simple in operation method, low in implementation cost, high in verification test efficiency and precision and the like.

The invention relates to the field of radio frequency circuits, and discloses a BGA port radio frequency transmission performance detection device and detection method. The BGA port radio frequency transmission performance detection device comprises a radio frequency connector, a radio frequency substrate for transition, and BGA balls. The radio frequency connector is provided with an interface used for being connected with a radio frequency tester, the radio frequency connector is connected with one surface of the radio frequency substrate, the BGA balls are arranged on the other surface of the radio frequency substrate, and the array arrangement form of the BGA balls corresponds to a radio frequency port array of a BGA bonding pad of the composite substrate; and the BGA balls are connected with the corresponding radio frequency ports on the composite substrate through the radio frequency elastic interconnection structures to realize radio frequency interconnection. According to the device and method, the radio frequency transmission performance of the bare board of the composite substrate provided with the BGA packaging radio frequency product is detected in advance, and the radio frequency performance screening work of the bare board before assembly is completed; and the frequency test range is expanded to more than four times of that in the prior art. By integrating with aproper automatic machine, automatic positioning, testing and screening functions can be realized, and the detection and screening efficiency is greatly improved.

The invention discloses a PCBA calibration clamp and a calibration method thereof. The PCBA calibration clamp comprises a clamp frame, a radio frequency head adjusting plate, a PCBA size adjusting plate, a comprehensive testing device, a radio frequency head, a radio frequency wire and a PCBA radio frequency testing interface. The clamp frame is a frame seat of a clamp and is used for loading thePCBA size adjusting plate and the radio frequency head adjusting plate; the radio frequency head adjusting plate is used for adjusting the radio frequency head to correspond to a radio frequency testing seat of PCBA; the PCBA size adjusting plate is used for adjusting the size of PCBA and fixing PCBA; the comprehensive testing device is used for testing a radio frequency index of a mobile phone PCBA, and is connected with the radio frequency head through the radio frequency wire; and the PCBA radio frequency testing interface is connected with the mobile phone PCBA. The invention can effectively and rapidly carry out a calibration test on the mobile phone PCBA in the production of the mobile phone, thereby reducing the production cost and improving the production efficiency for manufacturers.