Difference between revisions of "Kits and Parts Mixers"
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* LO driven be NanoVNA Tx | * LO driven be NanoVNA Tx | ||
* IF output to NanoVNA Rx | * IF output to NanoVNA Rx | ||
| + | * IF at 9 MHz | ||
| + | ** VSWR: 2.233 | ||
| + | ** S21 Gain: -67 dB | ||
[[file:ADE-1.NanoVNA_LO-to-IF.png]] | [[file:ADE-1.NanoVNA_LO-to-IF.png]] | ||
Revision as of 09:09, 1 October 2021
Contents
Kits and Parts Mixers Features in Common
- All Ports are 50Ω
- +7dBm Local Oscillator Injection Design
- Full Diplexer at the IF Port
- Optional Attenuators for RF & LO Ports
- Available as bare PCB or kit of parts
My Typical Applications
- 7 MHz RF, 40 M band
- 16 MHz LO
- Si5351A square wave drive, 50 Ohm source impedance, 1.65V peak
- 9 MHz IF feeds Crystal Filter
Kits and Parts ADE-1 Mixer
- Kits and Parts Mixer
- Build and tune diplexer first
Toroid Winding Direction
- Toroids needs to be wound to match the pad locations/offsets on the PCB
Kits and Parts Diode Mixer
- Double Balanced Diode Ring Mixer Kit
- Build and tune diplexer first
Bridged Tee Diplexer
Diplexor is a bandpass/band-stop filter popularized by Joe Reisert W1JR that is used after a double Balanced Mixer to provide a 50 ohm termination to all frequencies at the mixer's IF port, and to the following amplifier stage. Maintaining a consistent load at the mixer avoids overload and Inter-Modulation Distortion (IMD) effects that these mixers are prone to when not properly terminated.
LTSpice simulation
- 9 MHz
- FT37-67, 20T-12" = 8 uH
- T37-17, 13T-10" = 250 nH
- C2 adjusts peak from left to right
Measurements
- NanoVNA
- No RF in
- LO driven be NanoVNA Tx
- IF output to NanoVNA Rx
- IF at 9 MHz
- VSWR: 2.233
- S21 Gain: -67 dB
Videos
