Betso CPAA-18

Betso CPAA-18 [CPAA-18]

The Betso CPAA-18 is a circularly polarized active UHF receiving antenna covering 470–850 MHz. Circular polarization reduces sensitivity to transmitter antenna orientation and helps in non-line-of-sight situations and obstructed RF environments. Its onboard amplifier features an ultra-low noise figure and adjustable gain from −9 to +18 dB, allowing compensation for long coax runs or preventing receiver input overload when using short cables in strong RF fields. The antenna is powered through the coax cable from 5–20 V DC.

Main Features

• Circular polarization for improved link performance when transmitter orientation is random and in challenging RF environments.
• Active antenna with ultra-low noise amplifier (IC noise figure < 0.75 dB).
• Adjustable gain from −9 to +18 dB in 1 dB steps.
• Gain range designed both for coax-loss compensation (long cables) and for avoiding receiver input overshoot (short cables/strong signals).
• High-efficiency input filtering to attenuate unwanted RF spectrum outside typical wireless operating ranges.
• Built-in 7-segment LED gain display with automatic or manual brightness control and standby mode.
• Water-sealed ABS cover; amplifier module in CNC-milled anodized aluminium alloy, sealed for water resistance.
• Mounting via 1/4" and 3/8" threads plus 4× M4 mounting holes on a 100×100 mm pitch.

Specifications

• Frequency range: 470–850 MHz.
• Antenna polarization: circular.
• Antenna directivity: cardioid.
• Antenna gain: 7.5 dB average (8.5 dB peak).
• Amplifier gain: −9 to +18 dB, adjustable in 1 dB steps.
• Amplifier IC noise: < 0.75 dB.
• Amplifier IP3: > 34 dBm.
• Antenna VSWR: < 1.2 (max. 0.8% of received signal power is reflected).
• Input filter attenuation: high below 450 MHz (e.g. −82 dB @ 100 MHz) and high above 870 MHz (e.g. −35 dB @ 2.4 GHz).
• Powering: via coax cable, 5–20 V DC.
• Current consumption: 35 mA (depends on LED display operating mode).
• Display: bright blue LED with automatic or manual brightness settings and standby mode.
• Mechanical construction: CNC-milled, anodized aluminium alloy and highly durable ABS plastic.
• Dimensions (h × w × d): 315 × 315 × 110 mm.
• Weight: approx. 1.4 kg.

Included

• Betso CPAA-18 antenna [CPAA-18].

Video

Watch the Betso CPAA-18 product video on YouTube