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 be randomly 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.
Features
- Circular Polarization Benefits
- Ultra Low Noise Onboard Amplifier - 9 to + 18 dB
- Excellent RF parameters
- Highly efficient input filters for removing
unwanted RF spectrum
- Easy gain setting with automatic last set gain storing
- Brightness of LED display can be automatically adjusted according to ambient light
- Display can be completely turned off with ability to show preset gain value upon button request
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.
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.
Specifications
| Frequency range |
470 MHz to 850 MHz |
| Input filters attenuation |
High below 450 MHz (for example -82dB @ 100 MHz)
High above 870 MHz (for example -35dB @ 2.4 GHz) |
| Antenna gain |
7.5 dB of avarage gain (peak 8.5 dB) |
| Antenna directivity |
Cardioid |
| Antenna polarization |
Circular |
| Amplifier gain |
-9 to 18 dB |
| Amplifier IC noise |
Ultra low noise < 0.75 dB |
| Antenna VSWR |
Excellent < 1.2 (max. 0.8% of received signal power is reflected) |
| Amplifier IP3 |
Very high > 34 dBm |
| Display |
Bright blue LED with automatic or manual brightness settings and stand-by mode |
| Powering |
External powering 5 - 20 V DC |
| Current consumption |
35 mA |
| Mechanic construction |
CNC milled, anodized aluminium alloy and ABS highly durable plastic |
| Mounting |
1/4" and 3/8" threads |
| Dimensions (h x w x d) |
315 x 315 x 110 mm (12.4" x 12.4" x 4.33") |
| Weight |
approx. 1.4 kg (3.1 lb.) |
