Difference between pages "File:ADE-1.NanoVNA RF-to-IF 1-100MHz.png" and "Kits and Parts Mixers"

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== 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
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* 16 MHz LO
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** Si5351A square wave drive, 50 Ohm source impedance, 1.65V peak
 +
* 9 MHz IF feeds Crystal Filter
 +
** SSB or CW [[Crystal Filter Design|Crystal Filter Design]]
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*** [[Crystal Filter Design#SSB 4 Crystal Filter on Kits and Parts Board|SSB4 Crystal filter]]
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*** [[Crystal_Filter_Design#CW 5 Crystal Filter on Kits and Parts Board|CW5 Crystal Filter]]
 +
 +
== Kits and Parts ADE-1 Mixer ==
 +
 +
* [https://kitsandparts.com/ADE.php Kits and Parts Mixer]
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* Build and tune diplexer first
 +
 +
[[file:ADE-1.SCH.png]]
 +
 +
[[file:ADE-1.PCB.png]]
 +
 +
==== Toroid Winding Direction ====
 +
 +
* Toroids needs to be wound to match the pad locations/offsets on the PCB
 +
 +
[[file:toroid-cw.jpg]]
 +
 +
=== ADE-1 Schematic ===
 +
 +
[[file:ADE-1_Schematic.PNG]]
 +
 +
=== Performance ===
 +
 +
[[file:Chart_dBm-to-Volts.PNG]]
 +
 +
[[file:ADE-1_Performance.PNG]]
 +
 +
[[file:ADE-1_ElectricalSpecs.PNG]]
 +
 +
=== Port VWSR ===
 +
 +
* Measured VSWR of 2.23 at 9 MHz with NanoVNA matches spec nicely
 +
 +
[[file:ADE-1_LO_VSWR.PNG]]
 +
 +
[[file:ADE-1_IF_VSWR.PNG]]
 +
 +
[[file:ADE-1_RF_VSWR.PNG]]
 +
 +
== Kits and Parts Diode Mixer ==
 +
 +
* [https://kitsandparts.com/DBDM.php Double Balanced Diode Ring Mixer Kit]
 +
* Build and tune diplexer first
 +
 +
[[file:DBDM.SCH.png]]
 +
 +
[[file:DBDM.PCB.png]]
 +
 +
== Bridged Tee Diplexer ==
 +
 +
Diplexor is a bandpass/band-stop filter popularized by [https://www.youtube.com/watch?v=iVUv8C-8g-Y 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
 +
 +
[[FILE:DIPLEXER_SPICE_SIM.PNG]]
 +
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* [https://www.changpuak.ch/electronics/calc_16a.php Diplexer Calculator (Bridged Tee) Diplexer Calculator]
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* [https://www.qsl.net/g3oou/mixerterminations.html Mixer Diplexer description]
 +
 +
[[file:Diplexer.PNG]]
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 +
[[file:Diplexer_pass.PNG]]
 +
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<video type="youtube">zOk_0IiIgZY</video>
 +
 +
=== Adjust Diplexer C1 ===
 +
 +
* Drive RF port from NanoVNA
 +
* Listen on IF port of NanoVNA
 +
* No drive on LO
 +
* 9 MHz is IF design frequency
 +
* Nano VNA set to scan from 1 Mhz to 30 MHz
 +
** Shows peak at 9 MHz
 +
 +
[[file:ADE-1.NanoVNA_RF-to-IF.png]]
 +
 +
* Scan from 8 to 10 MHz
 +
* Adjust C1 to peak near 9 MHz
 +
** Eliminate double peaks
 +
 +
[[file:ADE-1.NanoVNA_RF-to-IF_8-10MHz.png]]
 +
 +
== Measurements ==
 +
 +
* NanoVNA
 +
* No RF in
 +
* LO driven by NanoVNA Tx
 +
* IF output to NanoVNA Rx
 +
* IF at 9 MHz
 +
** VSWR: 2.233
 +
** S21 Gain: -67 dB
 +
 +
[[file:ADE-1.NanoVNA_LO-to-IF.png]]
 +
 +
* NanoVNA
 +
* No LO in
 +
* RF driven by NanoVNA Tx
 +
* IF output to NanoVNA Rx
 +
* IF at 9 MHz
 +
** VSWR: 2.216
 +
** S21 Gain: -42 dB
 +
 +
[[file:ADE-1.NanoVNA_RF-to-IF.png]]
 +
 +
== Videos ==
 +
 +
<video type="youtube">GvadQpkZ8l0</video>
 +
 +
<video type="youtube">Mm7WfVzr1ao</video>

Revision as of 10:11, 1 October 2021

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

Kits and Parts ADE-1 Mixer

ADE-1.SCH.png

ADE-1.PCB.png

Toroid Winding Direction

  • Toroids needs to be wound to match the pad locations/offsets on the PCB

Toroid-cw.jpg

ADE-1 Schematic

ADE-1 Schematic.PNG

Performance

Chart dBm-to-Volts.PNG

ADE-1 Performance.PNG

ADE-1 ElectricalSpecs.PNG

Port VWSR

  • Measured VSWR of 2.23 at 9 MHz with NanoVNA matches spec nicely

ADE-1 LO VSWR.PNG

ADE-1 IF VSWR.PNG

ADE-1 RF VSWR.PNG

Kits and Parts Diode Mixer

DBDM.SCH.png

DBDM.PCB.png

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

DIPLEXER SPICE SIM.PNG

Diplexer.PNG

Diplexer pass.PNG

Adjust Diplexer C1

  • Drive RF port from NanoVNA
  • Listen on IF port of NanoVNA
  • No drive on LO
  • 9 MHz is IF design frequency
  • Nano VNA set to scan from 1 Mhz to 30 MHz
    • Shows peak at 9 MHz

ADE-1.NanoVNA RF-to-IF.png

  • Scan from 8 to 10 MHz
  • Adjust C1 to peak near 9 MHz
    • Eliminate double peaks

ADE-1.NanoVNA RF-to-IF 8-10MHz.png

Measurements

  • NanoVNA
  • No RF in
  • LO driven by NanoVNA Tx
  • IF output to NanoVNA Rx
  • IF at 9 MHz
    • VSWR: 2.233
    • S21 Gain: -67 dB

ADE-1.NanoVNA LO-to-IF.png

  • NanoVNA
  • No LO in
  • RF driven by NanoVNA Tx
  • IF output to NanoVNA Rx
  • IF at 9 MHz
    • VSWR: 2.216
    • S21 Gain: -42 dB

ADE-1.NanoVNA RF-to-IF.png

Videos

File history

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