News
FM Notch or FM Band Stop Filter
Posted by GPIO Labs on
An FM notch filter is used to reject strong FM signals in receiver applications. A good FM Notch filter will reject FM signals and have low insertion loss for signals outside the band.
FM reception using the 40 dB LNA and HackRF
Posted by GPIO Labs on
David Goldstein sent in a few pictures that show FM reception without and with the 40 dB LNA. A significant gain in performance with the LNA. Thanks David!
Considerations when using high-gain LNAs
Posted by GPIO Labs on
Some of our LNAs provide in excess of 40 dB of gain and operate over a wide frequency range. The primary application of these products is to amplify weak signals by increasing the signal-to-noise ratio at the receiver.
Precautions when using LNAs
Posted by GPIO Labs on
Our LNA products use a micro-USB connector for powering the device. The choice of this connector was based on the popularity of USB and the reasoning that it's easy to find cell phone chargers. The only negative with this connector is that it is easy to rip them off the board if handled improperly.
GPS Bandpass Filter
Posted by GPIO Labs on
Herbert Ullmann AF4JF, tests and describes some applications of the 433 MHz, GPS and 1268 MHz bandpass filters