Active MF-HF-FM Receiving Antenna VPA 30
For many years, Naval Electronics has been a recognized design and manufacturing company for shipboard antennas and CATV/MATV-systems. The experience gained during this period, has gone into the new VPA30 active receiving antenna. Thorough design of mechanical and electrical parts will give years of troublefree, high performance, meeting the very special demands put on shipboard antennas. The VPA-30 is a very compact active antenna optimized for AM reception from 100 kHz to 30 Mhz and the FM broadcast band of 88-108 MHz. The antenna is omnidirectional and senses vertical polarization.
-Antenna factor Ka=0.16 with overall
-High signal handling capability, desensitization 1 dB at 10 V/m input.
-Extremely low intermodulation.
-External noise limited (50% probability according to CISPR 322).
-Die-cast hydronalium body, which is salt water resistant.
-Lightning arrester built in.
-Recognized equipment by Det Norske Veritas, approval no A-4531. Cold test according to USSR Register of shipping. Salt mist test according to DEF-STAN 810D.
AM Frequency range (Mhz) 0.1-30
Returnloss (dB) >17 IP2 in (V/m) 1250 IP2 out (dBm) +60
IP3 in (V/m) 150 IP3 out (dBm) +38
Antenna factor Ka 0.16 Antenna noise
External noise limited (50% probability according to CISPR 322)
FM Frequency range (MHz) 68-110
Output impedance (ohm)
75 Return loss (dB) 8 Antenna gain (dBi) typ 3
AM-FM Overall frequency range (Mhz) 0.1-110
Coaxial connector* 75 ohm female BNC
Rod length (mm) 850
Rod diam. (mm) 10
Base height (mm) 200
Base max diam. (mm) 84
Mounting pipe diam. (mm) 45-50 Weight (kg) 1.65
POWER & ENVIRONMENT
Supply voltage DC (V) 15+17%
Supply current (mA) 115+10
Temperature range (C) -40 - +70
On shortwave, short vertical antennas like the VPA-30 demonstrate quieter reception with much less atmospheric noise than wire antennas, especially important on lower shortwave frequencies.
On the FM Radio band a remote passive antenna is subject to severe feedline losses, resulting in weaker signals at the receiver's antenna input. The internal low-noise amplifier of the VPA-30 increases signal strength before any cable losses are encountered, delivering much stronger signal levels to the receive
Naval Electronics, Inc.
7028 West Waters Ave Suite 393,
phone (813) 885-6091
fax (813) 885-3601