Betso Circular Polarised Antenna with Gain Adjustment

Betso CPAA-18 Circular Polarised Antenna with Gain Adjustment

The CPAA-18 is the flagship of receiver antennas because of its enhanced receiving performance. Circular polarization, compared to traditional linear polarization, has much better performance in non-line-of-sight situations and mainly in situations, where transmitter antenna can berandomly oriented in the horizontal or vertical position. Additionally the inbuilt, high quality, extremely low noise amplifier, is ideal for situations where long cables with high attenuation have to be compensated or where signal strength is too weak.

Circular Polarization Benefits

The main advantage of the receiver antenna with circular polarization is its orientation independence which is independent of the orientation of the transmitter antenna. In traditional linear polarized systems, when antennas are not aligned, there is a significant link performance degradation, which can lead to link losses -> dropouts.

On the other hand when the receiver antenna with circular polarization is used, this problem almost does not exist. Moreover, the link performance is even better in adverse weather conditions or in environments with a lot of obstructions, which are effects that cause signal polarization displacements.

Ultra Low Noise Onboard Amplifier - 9 to + 18 dB

Inbuilt ultra low noise amplifier allows antena usage in the situations with variable coaxial cable length from antena to receiver device. Higher attenuation of longer cables can be easily compensated by increasing gain, while in the situations with very short cables and strong receiving signal zero or even negative gain assures not to overshoot input dynamic range of the receiver.

The Antenna can be powered externally through coaxial cable from power source of 5 - 20 V DC. Professional hardware design with best in class integrated circuits results in extremely low power consumption which will be a big plus for your shooting rig performance.

Amplifier can be easily adjusted to any value betwen - 9 and + 18 dB in the steps of 1 dB.

Excellent RF parameters
What is unique about CPAA-18 is its excellent RF parameters.

Voltage Standing Wave Ratio of less than 1.2 ensures great signal power reception. Very high Third-order Intercept Point IP3 >34 dBm providing great linearity and finally industry leading ultra low noise amplifier IC with noise figure 0.75 dB.

High efficient input filters for removing
unwanted RF spectrum
CPAA-18 high efficient input filters help to prevent receivers intermodulation with other sources in band outside of the main working range of wireless systems like walkie talkies, FM radios, wireless focus systems, WiFi and bluetooth devices, mobile phones, etc.

Performace of wireless system will be better with less dropouts.

Plug and Work
Preset value of onboard amplifier gain is displayed on Inbuilt seven segment LED display upon power on and if required it keeps displaying for permanent possible readouts.

Display has furthermore automatic brightness setting feature, which adjusts its brightness according to actual ambient light condition avoiding unacceptable situations of everywhere shining display in dark places or unreadable gain value on direct sun light.

This automatic brightness feature can be disabled by setting of fixed brightness value or the display can be completely turned off while amplifier keeps working. In this mode any button press will temporally power on the display for possibility of changing the settings or just for preset gain readout.