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| 1Österreichsicher Versuchssenderverband
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|File: 2019-12-04_NanoVNA_v02.ppt
Agenda
2
1. NanoVNA
Beschreibung, was man nicht erwarten darf, Menue, Clones, Innenleben,
Blockschaltbild, Schaltung, Lieferumfang, technische Daten, Preise,
Touchstone Export, Open Source SW, Forum, Console Commands,
2. THEORIE
Scattering Parameter, Stehwelllenverhältnis, Reflexionsdämpfung,
Smith Chart
3. MESSUNGEN
Widerstand, Kondensator, Spule, Quarz, AL-Wert, Einfügungs-
dämpfung, Filter (Tiefpass, Bandpass), Balun, Antennen (Dipol,
Groundplane, Batwing), Dummyload, Koaxleitung, Verkürzungsfaktor.
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|File: 2019-12-04_NanoVNA_v02.ppt
Beschreibung
3
Der NanoVNA ist ein Vector Network Analyzer
für den Frequenzbereich von 50KHz bis 900MHz
mit einem 2.8" Touch LCD und LiPo Akku
in Scheckkartengröße.
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|File: 2019-12-04_NanoVNA_v02.ppt
Was man nicht erwarten darf
4
Quelle: https: https://nuclearrambo.com/wordpress/comparing-nanovna-with-the-keysight-fieldfox-n9952a/
• schnelle Messreihen
• Genauigkeit auf ein Zehntel dB
• Dynamikbereich von 100dB
• GHz Frequenzbereich
<€50 >€20.000
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|File: 2019-12-04_NanoVNA_v02.ppt
Was man nicht erwarten darf
5
Quelle: https://groups.io/g/nanovna-users/photo/0/7?p=Created,,,20,2,0,0
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|File: 2019-12-04_NanoVNA_v02.ppt
Menü
6
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|File: 2019-12-04_NanoVNA_v02.ppt
CLONES
7
Source: https://german.alibaba.com/
https://www.ebay.de/i
1.5GHz Version
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|File: 2019-12-04_NanoVNA_v02.ppt
INNENLEBEN
8
Quelle: https://groups.io/g/nanovna-users/attachment/957/0/NanoVNA_startup.jpg
on/off USB
TX
RX
LiPo-Akku
LiPo-Akku
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|File: 2019-12-04_NanoVNA_v02.ppt
INNENLEBEN
9
https://ttrf.tk/posts/2016-11-08-calibration-process-in-python-for-nanovna/
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|File: 2019-12-04_NanoVNA_v02.ppt
BLOCKSCHALTBILD
10
Quelle: https://github.com/ttrftech/NanoVNA/blob/master/doc/nanovna-blockdiagram.png
SA612A is a low-power VHF monolithic double-balanced
mixer with on-board oscillator and voltage regulator.
Si5351 is an I2C configurable clock generator that is
ideally suited for replacing crystals, crystal oscillators,
VCXOs, phase-locked loops (PLLs), and fanout buffers
incost-sensitive applications.
TLV320 is a high-performance stereo audio codec with
highly integrated analog functionality.
ILI9341 is a 262,144-color single-chip SOC driver for a-
TFT liquid crystal display with resolution of 240RGBx320
dots, comprising a 720-channel source driver, a 320-
channel gate driver, 172,800 bytes GRAM for graphic
display data of 240RGBx320 dots, and power supply
circuit.
STM32F072C8T6 is a ARM®-based 32-bit MCU, up to
128 KB Flash, crystal-less USB FS 2.0, CAN, 12 timers,
ADC, DAC & comm. interfaces, 2.0 - 3.6 V
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|File: 2019-12-04_NanoVNA_v02.ppt
SCHALTUNG
11
Quelle: https://github.com/ttrftech/NanoVNA/blob/master/doc/nanovna-sch.pdf
Mixer
Touch LCDDSP
LOVCTCXO
Ch0
s11
Ch1
s21
ADC
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|File: 2019-12-04_NanoVNA_v02.ppt
LIEFERUMFANG
12
Quelle: https://github.com/ttrftech/NanoVNA/blob/master/doc/nanovna-sch.pdf
USB KabelKalibrierungs-Set
2x SMA Kabel
NanoVNA
SM
Af -
SM
Af
50Ω
LL
KS
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|File: 2019-12-04_NanoVNA_v02.ppt
Wichtige Spezifikationen für einen VNA
13
Quelle: https://www.mwrf.com/print/18192
Frequency range: This is the main specification. A network analyzer’s frequency
range defines the minimum and maximum frequencies it can measure.
Dynamic range: This defines the range of power that the network analyzer can
measure.
Number of test ports: A network analyzer can have two, four, or more test ports.
Measurement speed: This is the time required to perform measurements across
a range of frequencies.
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|File: 2019-12-04_NanoVNA_v02.ppt
TECHNISCHE DATEN
14
Basic performance:
• PCB: 54mm x 85.5mm x 11mm (without connectors, switches)
• Measurement frequency: 50KHz ~ 300MHz (50KHz -900MHz, enable extended firmware)
• RF output: -13dBm (maximum -9dBm)
• Measurement range:
70dB (50kHz-300MHz),
60dB (300M-600MHz),
50dB (600M-900MHz) enable extended firmware)
• Port SWR: < 1.1
• Display: 2.8 inch TFT (320 x240)
• USB interface: USB type-C communication mode: CDC (serial)
• Power: USB 5V 120mA, built-in 300mAh or 500mAh battery, maximum charging current 0.8A
• Number of scanning points: 101 (fixed)
• Display Tracking: 4
• Marking: 4,
• Setting Save: 5
• Measuring: S parameters, voltage standing wave ratio, phase, delay, Smith chart ...
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|File: 2019-12-04_NanoVNA_v02.ppt
NanoVNA - PREISE
15
Preise
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|File: 2019-12-04_NanoVNA_v02.ppt
Gehäuse für NanoVNA
16
https://picclick.de/Geh%C3%A4use-f%C3%BCr-den-NanoVNA-233348301384.html#&gid=1&pid=1
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|File: 2019-12-04_NanoVNA_v02.ppt
NanoVNA-H mit erweitertem Frequenzbereich bis 1.5GHz
17
Quelle: https://www.ebay.de/itm/50K-1-5GHz-NanoVNA-H-HF-VHF-UHF-Netzwerkantennenanalysator-
Gehause/333398845312?_trkparms=aid%3D333200%26algo%3DCOMP.MBE%26ao%3D1%26asc%3D40735%26meid%3Dc1e254dc056e4dcd9202c7915f22fb20%26pid%3D100008%26rk%3D7
%26rkt%3D12%26sd%3D362800305573%26itm%3D333398845312%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100008.m2219
EUR 45,38
Lieferumfang
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|File: 2019-12-04_NanoVNA_v02.ppt
Touchstone Export
18
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|File: 2019-12-04_NanoVNA_v02.ppt
OPEN SOURCE
19
Quelle: https://github.com/ttrftech/NanoVNA
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|File: 2019-12-04_NanoVNA_v02.ppt
NanoVNA - Forum
20
Quelle: https://groups.io/g/nanovna-users
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|File: 2019-12-04_NanoVNA_v02.ppt
NanoVNA – Console Commands
21
NanoVNA connects to USB as a virtual COM port and supports plain text commands
based on ChibiOS/RT shell. Commands can be found in firmware main.c source code.
Quelle: https://groups.io/g/nanovna-users/wiki/shellcommands
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|File: 2019-12-04_NanoVNA_v02.ppt
NanoVNA – Console Commands
22
Quelle
: htt
ps:/
/gro
ups.io
/g/n
anovna
-users
/wik
i/shellc
om
mands
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|File: 2019-12-04_NanoVNA_v02.ppt
NanoVNA - App
23
https://play.google.com/store/apps/details?id=net.lowreal.nanovnawebapp&hl=de_AT
NanoVNA WebApp is an open source Android application for NanoVNA / NanoVNA-H.
It works by connecting with NanoVNA via USB.
You can do the following:
* Increase in measurement points (multi-segment scan)
* Get NanoVNA screen capture
* s1p s2p file generation
* Time domain measurement
A USB OTG cable connector is required to connect NanoVNA to an Android smartphone.
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|File: 2019-12-04_NanoVNA_v02.ppt 24
Theorie
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|File: 2019-12-04_NanoVNA_v02.ppt
STREUPARAMETER (Scattering Parameter)
25
Eingangs-
Reflexionsfaktor
Ausgangs-
Reflexionsfaktor
Vorwärts-
Transmissionsfaktor
Rückwärts-
Transmissionsfaktor
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|File: 2019-12-04_NanoVNA_v02.ppt
STREUPARAMETER (Scattering Parameter)
26
S11 is the input port voltage reflection coefficient
S12 is the reverse voltage gain
S21 is the forward voltage gain
S22 is the output port voltage reflection coefficient
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|File: 2019-12-04_NanoVNA_v02.ppt
STEHWELLENVERHÄLTNIS (Voltage Standing Wave Ratio, VSWR)
27
Das Stehwellenverhältnis (VSWR) ist wie folgt definiert:
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|File: 2019-12-04_NanoVNA_v02.ppt
REFLEXIONSDÄMPFUNG (Return Loss, RL)
28
Die Reflexionsdämpfung sagt aus wie nahe man an der Systemimpedanz ist.
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|File: 2019-12-04_NanoVNA_v02.ppt
SMITH CHART
29
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|File: 2019-12-04_NanoVNA_v02.ppt 30
Wir messen …
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|File: 2019-12-04_NanoVNA_v02.ppt
Kalibrierung
31
In practice, there are several VNA calibration methods, each of which has
unique benefits in various applications.
The following two VNA calibration methods exist:
• Short-Open-Load-Through (SOLT)
• Through-Reflect-Line (TRL)
nanoVNA
Kalibrierungs-Set
50Ω
LL
KS
http://download.ni.com/evaluation/rf/Introduction_to_Network_Analyzer_Measurements.pdf
Automatic VNA Calibration Kit
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Widerstand (s11)
32
fStop
fStart
50 Ω Widerstand
Start: 50KHz
Stop: 500MHz
f100MHz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Widerstand (SWR)
33
50 Ω Widerstand
Start: 50KHz
Stop: 500MHz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Kondensator (s11)
34
470pF Kondensator
Start: 1MHz
Stop: 200MHz
fStop
fStart
20nH
501pF
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Spule (s11)
4,7uH Ringkern
Start: 50KHz
Stop: 50MHz
35
fStop
fStart 7,4pF4,6uH
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|File: 2019-12-04_NanoVNA_v02.ppt
Bestimmung des AL-Wertes einer Spule
36
N=12
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Ringkerntrafo (s21)
1:1 Ringkern
Start: 50KHz
Stop: 200MHz
37
-3dB
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Quarz (s21)
38
Quarz 20MHz
fs
fp
Ersatzschaltbild Quarz
Center: 20MHz
Span: 50KHz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Quarz (s21)
39
Quarz 20MHz
Center: 20MHz
Span: 50KHz
fStop
fStart
Ersatzschaltbild Quarz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Tiefpass-Filter (s21)
40
Tiefpassfilter 76MHz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Bandpass-Filter (s21)
41
Bandpassfilter 9,9MHz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem 1:1 Balun (s11)
42
50 Ω Widerstand
1:1 Balun
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem 1:1 Balun (SWR)
43
50 Ω Widerstand
1:1 Balun
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem 1:2 Balun (s11)
44
200 Ω Widerstand
1:2 Balun
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem 1:2 Balun (SWR)
45
200 Ω Widerstand
1:2 Balun
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einem Dipol (s11)
46
1:1 Balun
Dipol
Dipol
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Dummy Load (s11)
47
Start: 50KHz
Stop: 800MHz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Dummy Load (SWR)
48
Start: 50KHz
Stop: 800MHz
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Koaxleitung (s11)
49
Start: 50KHz
Stop: 12MHz
SWR
1:1,39
50 Ω Widerstand
Fernes Ende mit 50 Ω Widerstand
abgeschlossen.
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Koaxleitung (s11)
50
Start: 50KHz
Stop: 12MHz
0 Ω Widerstand
Fernes Ende mit 0 Ω Widerstand
abgeschlossen.
SWR
1:2,85
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Koaxleitung (s11)
51
Start: 50KHz
Stop: 12MHz
Leerlauf
Fernes Ende mit Ω Widerstand
abgeschlossen. Leerlauf.
SWR
1:4,44
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Koaxleitung (s11)
52
Verkürzungsfaktor an einem Koaxkabel messenKurzschluss
10m RG58 Koaxkabel
mechanische Länge VNA
elektrische Länge
f=5,069MHz
Berechnung der elektrischen Länge:
Berechnung des Verkürzungsfaktors:
✓
Auszug aus dem Datenblatt
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Groundplane Antenne für 868MHz (s11)
53
Start: 785MHz
Stop: 900MHz
Step 1:Antenne ist zu lang,
Resonanz bei 802MHz.
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Groundplane Antenne (s11)
54
Start: 785MHz
Stop: 900MHz
Step 2:Durch vorsichtiges Abschneiden von 1mm Stücken
auf 868MHz getrimmt, SWR 1:1,1
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Batwing Antenne (s11)
55
Center: 300MHz
Span: 100MHz
60º bis 80º
Quelle: Antennenbuch, 7. Auflage, Seite 445, Rothammel,
Breitbanddipol
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Magnetic Loop Antenne (s11)
56
Start: 30MHz
Span: 31MHz
Anpassung mittels Gamma-Match
C = Rohr-
trimmer L
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Magnetic Loop Antenne (s11)
57
Start: 30MHz
Span: 31MHz
Anpassung mittels Gamma-Match
Durch Verschieben der Gamma-Match kann
eine optimale Anpassung erreicht werden
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|File: 2019-12-04_NanoVNA_v02.ppt
Messung an einer Magnetic Loop Antenne (SWR)
58
Magnetic Loop
Start: 30MHz
Span: 31MHz
fertig abgestimmte
Gamma Match
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| 59Österreichischer Versuchssenderverband
Harald Böck, OE3HBS
Tel. 0676 / 545 78 11
Wohnadresse:
Rueppgasse 23 / 15 | A-1020 Wien
Tel. 01 / 212 92 52
ADL319
Metafunk
https://metalab.at/wiki/MetaFunk