antennaz-bridgeandsignalsource

Antenna Z-Bridge and Signal Source

Design and Construction of an integrated Impedance Bridge for Antennas & Feedlines

Variable resistance type impedance bridges have been around for many years. Problem is that you usually need to obtain a signal source to determine the impedance at a specific frequency.

My effort depicted here is to design and build the impedance bridge, the signal source, and a digital dial for frequency readout...all in one integrated instrument.

OBJECTIVES:

• 1.6 to 56 mHz Coverage
• 0 to 1000 ohm range
• H&P Stabilized Oscillator

While battery power capability would be nice, that is not a primary objective of this project. Some attention will be devoted to keeping current requirements reasonable (using 74HCxx ICs, etc.), but that is not the primary focus.

Having an integrated 1.6 to 56 MHz signal source and digital frequency indicator is the only new idea in this design.

Work In Progress...more info later.