USB RTL-SDR & ADS-B Receiver Set, RTL2832U & R820T Tuner, MCX Input. Software Defined Radio Compatible with Android. R820T Tuner & MCX Antenna Input

This is an improvement on the low cost R820T Realtek tuner used for SDR. Made in Palm Bay Florida USA. This unit works with Android, Windows Vista/7/8 and Linux
1. To improve ESD/EOS reliability, added RF input port and I2C bus ESD protection circuit.
2. Minimized the RF trace from RF connector to device RF input pin.
3. Protected RF traces with ground traces and guard rings.
4. Used shielded connectors with all shields connected to the ground plane with low impedance connections.
5. Minimized the ground path to device E-pad for the crystal.
6. Placed crystal away from RF traces.
7. Protected crystal traces with ground traces and guard rings.
8. The crystal amplifier oscillator has a dedicated power supply pin (Pin11), which is decoupled from ground with minimal lead lengths in order to minimize board noise from coupling into the reference clock.
9. Moved system clocks and frequently switched signals should away from crystal and RF trace.
10. Placed AGC filter and CP filter circuits as close to the device as possible.
11. Minimized the CP filter ground path to device E-pad.
12. System digital traces routed away from RF traces.
13. Placed ceramic DC bypass capacitors as close to the device as possible. This insure that the power goes through the capacitors before power goes through the VIAs to the power plane.
14. Added Multi-layer board with power and ground on separate dedicated layers
15. MCX antenna specified at 1090 MHz freq, Gain over 5dBi, Azimuth of 360 deg, Impedance of 50 Ohm, with vertical polarization.