RF test probes and rf test antenna

In the RF/microwave/millimeter wave test, in addition to the coaxial and waveguide interconnection devices, there are two other main devices that interact with the DUT. They include surface probes connected to component leads or microstrip pads, and antennas designed for testing. There are huge differences in the types of tests applicable to rf test probes and antennas, but both are essential in the characteristics, consistency, and quality testing of radio frequency equipment and components.

RF test probe

RF test probe usually consists of a waveguide or coaxial connector suitable for the probe pin type. Probe needle types include single needle, ground/signal needle, ground/signal/ground needle, and coaxial needle. These probes are suitable for connecting component/device test points or pin disks located on the surface of a semiconductor wafer, chip or printed circuit board (PCB). If it is impossible to place a coaxial or waveguide connector on the surface or component/device due to performance, cost, or space constraints, probes are usually used in this case.

One of the most common uses of RF test probes is to perform wafer-level testing of components and equipment in high-frequency working conditions. In some cases, some RF test probes are suitable for testing millimeter wave circuits with a maximum operating frequency of hundreds of GHz. There are also several types of RF test probes that can be soldered or mechanically connected to the test surface (usually the surface of the PCB). But they are only used when such high-quality and high-cost interconnection is absolutely necessary, because they usually cannot be withdrawn without sacrificing interconnection quality.

RF test probes are usually used together with detection equipment with high-caliber positioning mechanisms or electronic devices to achieve small adjustments to the probe x, y, z and additional axes. Some simple mechanical test probe positioners can only fix the probe in the proper position during the test, while the more complex probe positioner with robot function can automatically position the probe through programming, which is suitable for large quantities test.

RF test antenna

The radio frequency test antenna can be used for over-the-air (OTA) testing. It is usually completed through communication standards and electromagnetic compatibility (EMC) standards tests. In these test cases, the device under test (DUT) is usually placed in the open-air test range (OATR) with low electromagnetic interference or in a fully anechoic chamber built for this purpose. Usually, this kind of antenna must meet the precise performance description specified by the standard. This includes precise gain, directivity, standing wave ratio and positioning requirements.

However, OTA testing is also applicable to other situations. Applications include the use of radar and platform-mounted equipment (such as ground vehicles and aircraft) for internal testing to confirm performance and operation during the prototype. Since the type of antenna used in this test depends on the system to be tested, we provide a variety of antenna types for you to choose from. The types of antennas include cone/horn waveguide, broadband waveguide, omnidirectional waveguide/coaxial, Yagi antenna coaxial, and other antenna types.