Agile navigation transmitter system that includes a single amplifier system

A method of amplifying and providing navigation signals to a navigation receiver, the method comprising:

• receiving a plurality of radio frequency (RF) signals oscillating at at least two different frequencies f1 and f2;
• splitting and forwarding the RF signals having the f1 frequency to a first bandpass filter and the RF signals having the f2 frequency to a second bandpass filter;
• receiving the RF signals from the first bandpass filter;
• receiving the RF signals from the second bandpass filter at substantially the same time as the first tunable amplifier's receipt of the RF signals from the first bandpass filter;
• amplifying by a first tunable amplifier the RF signals received from the first bandpass filter across a first band centered around the frequency f1;
• amplifying by a second tunable amplifier the RF signals received from the second bandpass filter across a second band centered around the frequency f2;
• feeding the amplified RF signals substantially concurrently into a mixer circuit for transmission via an RF antenna to the navigation receiver;
• and
• generating the RF signals by a digital processing circuit in digital form based on pre-stored signal characteristics specifying a plurality of navigation signals.

A transmission system for providing navigation signals, the system comprising:

• a splitter circuit configured to receive a plurality of radio frequency (RF) signals oscillating at at least two different frequencies f1 and f2, and configured to split and forward the RF signals having the f1 frequency to a first bandpass filter and the RF signals having the f2 frequency to a second bandpass filter;
• a first tunable amplifier configured to receive the RF signals from the first bandpass filter;
• a second tunable amplifier configured to receive the RF signals from the second bandpass filter at substantially the same time as the first tunable amplifier's receipt of the RF signals from the first bandpass filter;
• and
• a reference timing source and ephemeris reference source in communication with a digital processing circuit that generates the RF signals,
• wherein the first tunable amplifier is further configured to amplify its RF signals across a first band centered around the frequency f1, and the second tunable amplifier is further configured to amplify its RF signals across a second band centered around the frequency f2, and the amplified RF signals are fed substantially concurrently into a mixer circuit for transmission via an RF antenna to a navigation receiver.