In wireless testing scenarios such as OTA and RAT, antennas not only perform signal transmission and reception functions, but their frequency range, polarization mode, gain, standing wave ratio, and port isolation directly affect the construction and testing coverage of the testing link. With the continuous expansion of wireless product coverage frequency bands, from Sub-6GHz to millimeter wave, different test objects have put forward different requirements for antennas. In response to the testing needs of multi frequency bands, multi polarization, and different spatial structures, Liankang Information has developed a variety of antenna products including single polarization antennas, dual polarization antennas, circular polarization antennas, patch antennas, horn antennas, and millimeter wave horn antennas.

Liankang Information's existing antenna products cover frequency bands of structural types

◆ Single polarization or dual polarization antenna (depending on the testing method)

Single polarization antenna adopts linear polarization method, which is suitable for testing scenarios with clear polarization direction. Liankang's existing products can cover a frequency range of 700MHz to 12GHz, and provide gain configurations of approximately 7.5dBi, 8dBi, etc. according to different structures, which can be applied to wireless product testing in corresponding frequency bands.

Liankang Information Single Polarization Antenna

When testing requires coverage of two mutually orthogonal polarization directions, a dual polarized antenna can be used. Liankang Information's dual polarization products include PCB structures, patch structures, and horn structures, covering various application needs from around 600MHz to millimeter wave frequency bands. Some dual polarized horn antennas also provide a dual port isolation of ≥ 25dB and a cross polarization index of ≥ 20dB, suitable for testing systems with requirements for dual port and polarization performance. Some wireless devices do not use a single linear polarization method, so the testing system also needs to be equipped with corresponding circularly polarized antennas.

Liankang Information Dual Polarization Antenna

◆ Circular polarized antenna (requires corresponding polarization scheme)

The circularly polarized coupled plate antenna covers approximately 700MHz to 7.5GHz and can be configured according to testing requirements. Compared to only considering the frequency range, polarization matching can make the testing link closer to the actual wireless working state of the product. Therefore, when selecting the antenna, it is necessary to comprehensively consider the DUT antenna form and testing items.

Liankang Information Circular Polarization Antenna

For scenarios with limited space, relatively fixed testing distance and structural layout, patch antennas have a relatively compact structural form.

◆ Surface mount antenna (suitable for compact testing spaces)

This series of patch antennas features an integrated PCB compact design, dual polarization integrated layout, suitable for small fixtures and compact RF dark boxes, supports OTA/RAT wireless testing, and can be selected as needed to build a stable RF receiving link in a small testing space.

Liankang Information Patch Antenna

For testing scenarios that require high gain and clear radiation direction, horn antennas can be used.

Speaker antenna (balancing gain and directional testing requirements)

Horn antennas have the characteristics of wide bandwidth, stable gain, good directionality, and reliable structure, and are widely used in RF testing, OTA testing, antenna measurement, and wireless communication systems. For different testing requirements, dual polarization and open boundary structures can be designed to enhance testing coverage while balancing gain and directionality, providing stable signal transmission and reception conditions for wideband wireless testing.

Liankang Information Dual Polarization Horn Antenna

When the testing frequency is increased to the millimeter wave range, traditional low-frequency PCB antennas are no longer able to meet the same testing requirements.

◆ Millimeter wave antenna

For testing between 18GHz and 50GHz, Liankang Information provides millimeter wave dual polarized horn antennas with a gain of up to 15dBi, and is equipped with dual polarization, port isolation, and cross polarization performance. Millimeter wave antennas have a more compact size and can be further combined with millimeter wave testing fixtures, shielding environments, and RF testing systems to build wireless testing links for corresponding frequency bands.

Liankang Information Millimeter Wave Horn Antenna

Antenna selection is essentially testing system matching

Antennas are not independent test attachments. In actual OTA/RAT systems, the antenna needs to be matched with the test frequency band, DUT characteristics, test distance, shielding environment, RF instruments, and mechanical structure.

Considerations for antenna selection

>Antenna configuration plan

From 700MHz to 50GHz, from single polarization to dual polarization, circular polarization, from PCB antennas to millimeter wave horn antennas, different products address the RF link requirements in different testing scenarios. Liankang Information continues to improve its antenna product system around OTA/RAT testing, and combines RF testing instruments, shielding fixtures, and automated testing systems to provide more flexible antenna configuration solutions for different frequency bands and testing scenarios.