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Low Cost Coupling Methods for RF Power Detectors Replace Directional Couplers
- AN91 Linear Technology AN91 describes an RF feedback coupling method which
eliminates the directional coupler. Instead, a 0.4pF ±0.05pF capacitor and 50Ω
resistor are used to feed RF signal back to the LTC power controller. This
method reduces coupling loss variations, cost and lead time. (app note added
2/06)
Make a truly linear RF Power detector - 09/19/02 EDN Design Ideas /
(added 1/05) Modern high-performance transmitters require accurate
monitoring of RF power, because most cellular standards depend on strict
powertransmission levels to maintain an effective network. Regulation of
transmitted-signal strength also lets you build lower cost systems. Figure 1
shows a waveform-independent circuit that provides a linear....
