What is it?

The original PA0RDT Mini Whip is a very simple and effective active receive antenna for the VLF, longwave, medium wave and shortwave range. It consists of a small metal plate and a buffer amplifier. The amplifier has a very high input impedance (implemented using a JFET as a source follower) to sense the voltage between the metal plate and ground, and a low output impedance (implemented using an NPN transistor as an emitter follower) to drive the 50 ohm coax cable.

Specifications

To be used for Radio Reception

Frequency range: 10 kHz - 30 MHz

Power: DC 5 - 13 V, 100 mA

RF connector: SMA

Feed line: 50 Ohm coaxial cable

Used PCB Material: FR-4

PCB thickness: 1.6 mm

PCB copper weight: 1 oz

What makes it special?

The Main advantage of this antenna is that it very small and can be installed everywhere where space is not available.

Being a powered device it will perform in all conditions and reception is very crisp.

Assembled Unit - PCB option available -