SV4401A Handheld Vector Network Analyzer




     SV4401A is a handheld Vector Network Analyzer (VNA) with frequency range of 50kHz ~ 4.4GHz. It can be used for S11 and S21 measurements. The S21 dynamic range of SV4401A is 75 dB, while the S11 dynamic range is 50 dB.

     SV4401A is suitable for antenna testing of MF/HF/VHF/UHF bands, such as shortwave antennas, ISM band antennas, WiFi antennas, Bluetooth antennas, GPS antennas, etc. It can also be used to measure filters, amplifiers, attenuators, cables, power dividers, couplers, duplexers and other RF components. SV4401A supports a variety of display formats: Log Mag, Linear Mag, Phase, Smith R+jX, Smith R+L/C, VSWR, Polar, Group delay, Resistance, Reactance, etc. In addition, SV4401A supports TDR function which is useful for cable lengths measurement.

     SV4401A is designed with metal case, which is durable and can effectively shield electromagnetic interference. The dimension of SV4401A is 190mmx130mmx30mm, and a back bracket is designed for desktop use. The RF interface of SV4401A is N-type femal connector and a pair of N-to-SMA adapters are included, witch can be used to connect DUTs with SMA interfaces.

     With the optimally designed signal processing system, the scan speed of SV4401A is 400 points/s, which enables a quasi-real-time measurement, and the maximum scanning points is up to 1001. The screen of SV4401A is a 7-inch high-brightness IPS capacitive touch screen, which allows users to see the screen content clearly in outdoor. SV4401A adopts a full touch screen design, with 4 physical buttons, users can quickly set frequency range, scale, turn on/off traces, add/delete markers, screenshots, and so on. The operation is quite convenient and smooth.

     The SV4401A has two built-in 3350mAh 18650 lithium batteries with a battery life of up to 4 hours. The charging interface is USB Type-C, and the included Type-C cable can be used to charge the device and also for data transfer. At the same time, the SV4401A has a built-in 8GB memory card, which can be used to store calibration status, snp files, screenshots, etc.

Basic Performance




RF Output Power 

- 42dbm ~ -12dbm

Step: 1dB
RF Interface
N connectorsEquipped with N/SMA adaptors
RF Input Power0dBm (MAX)DC< 5V
Frequency      Accuracy

<± 1ppm

<± 5ppm



S21 Dynamic 






S11 Dynamic 






Scan Points1001Can be set from 101 to 1001
Scanning Speed400 points/sf>140MHz
Smoothing Processing



Average 1-25
Trace 74 data trace, 2 reference traces, 1TRD trace
Calibration status storage slots


Memory Card8GTF-Card
Screen7-inch IPS LCDResolution: 1024 x 600
Battery Life4 hours

50% Screen Brightness

Battery Duo 18650 lithium3.6V / 3350mAh x 2
Charge/DataUSB Type-C

Charging Voltage4.7V~5.5V
5V/2A charger is recommended
Output PowerUSB 5V/1A

Shell MaterialIron


1.65kgWith Bag
Operating Temperature0°C~45°C


 Appearance Of SV4401A Products




PC Software

NanoVNA_Saver_0.3.10--by SYSJOINT


PC Software Driver

SV4401A Driver:  SV4401A_usb_cdc_driver.rar

For Win10 system, you do not need to install the driver.

For Win8 and earlier versions of the Windows system, you need to install the driver: 

Technical Documentation

SV4401A Handheld Vector Network Analyzer User Manual V2.0

Firmware Upgrade


SV4401A firmware 0.2.1 features:

1. Add sweep analysis function: open it through the menu [MARK] -> [SWEEP ANALYSIS];

2. Add snp file parsing function: you can open and load local snp files in the file manager;

3. When saving the calibration state to an occupied slot, a dialog box will pop up for asking whethe

    r to overwrite;

4. Add 3 new console commands: save, recall, cal;

5. The reference traces will be automatically cleared when frequency range is changed;

6. Fixed the bug that Edelay was not updated when the calibration state was recalled;

7. Optimized the display format of the frequency range on the main screen;


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SV4401A (English Version) Purchase Guide

AliExpress Official Store : SYSJOINT Store

Distributorship please contact Chelegance:

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