Receiver Front End Protection

Receiver Front End Protection When Used with Active Antenna AAA-1

AAA-1 active antenna has very high dynamic range and its 1 dB compression point is at +20 dBm. At the output a heavy clipped signal can reach 6 V pp. This voltage is safe for the most of the conventional receivers and transceivers. This limit is reached only when there is a nearby transmitter or nearby lightning strike. Normally the total output power from 20 KHz to 30 Mhz is below 0 dBm at the antenna output.

AAA-1 is well protected at the input and does not need any special measures even when legal power TX is used. But the output voltage might be a problem for some receivers (Rx).

Radiation Patterns Diagram

Radiation Patterns of 2-el. Active Receiving Phased Array for Loop and Dipole Mode pdf-icon

These are the expected radiation patterns using active antennas AAA-1 and VDLine kits combined in dual mode (dipole/loop) 2-element phased array…

Additional Environment Protection

Additional Environment Protection of the AAA-1 and VDL-1 Devices pdf-icon

The AAA-1 amplifier is inserted in a box which is marked as IP55 protection class. According to the standard it is dust and water protected. The standard says…

Wideband Small Receiving Loop Simplified

Wideband Small Receiving Loop Simplified

This is a small loop connected to an amplifier with very low input resistance e.g.3 ohms. The small loop is injecting current into this amplifier. The loop works almost in…

Reducing the Noise in Dipole Mode with Common Mode Filter

Reducing the Noise in Dipole Mode with Common Mode Filter pdf-icon

The noise in dipole mode in AAA-1 active antenna is usually higher than in the loop mode. One can make the wrong conclusion that the short dipole is a very noisy antenna…

Adding an Input Balun in AAA-1 in Dipole Mode

Adding an Input Balun in AAA-1 in Dipole Mode to Reduce 2nd Order IMD Distortions when Asymmetric Signal Source (antenna) is Used pdf-icon

When using large loops as dipole arms with AAA-1 active antenna amplifier or totally asymmetric electric antennas such as ground plane (GP), some 2-nd order IMD distortion might occur due to asymmetric signal source combined with the strong signals…

Addtional Info

The following links are useful for additional information and understanding of the Amplifier for Small Magnetic and Electrical Wideband Receiving Antennas.