AdvancedA-007-001-004

For an antenna tuner of the "Pi" type, which of the following statements is false?

B
Answer
Interference, EMC, and safety
Type
A
The circuit is a Pi-type antenna tuner
B
The circuit is a series-type antenna tuner
C
The transmitter input is suitable for impedance of 50 ohms
D
The antenna output is suitable for impedances from low to high

Answer Notes

A Pi-network (Pi-type) antenna tuner uses one series component (usually an inductor) flanked by two shunt components (usually capacitors) that bridge to ground, forming the shape of the Greek letter Pi. This versatile design allows it to match a standard 50-ohm transmitter input to a broad range of impedances, from low to high. The false statement is calling it a "series-type" antenna tuner. While a Pi-network does contain a series component, a strictly series-type tuner lacks the dual parallel shunt elements that define the Pi-network topology.
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For an antenna tuner of the "L" type, which of the following statements is false?
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What is a pi-network?