5G UD Box | Up/down converter | Up to 44 GHz | TMYTEK
Cover RF up to 44 GHz

UD Box

5G NR Up-Down Converter

Why UD BOX ?

Cover Most 5G Spectrum
Our UD Box operates from 24 to 44 GHz (RF) | 0.01 to 14 GHz (IF). It covers most 5G NR FR2 bands as well as lower broadband applications.
Save Testing Cost
Down convert RF to IF band can enable sub-6G test equipment to be used again for mmWave productions. Save the cost from expensive mmWave instruments.
Prevent Path Loss
In CATR, path loss of long cable is a common issue. UD Box outputs IF enables long cable connection between the chamber and test equipment.
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5G Development tool for baseband researchers and telecom carriers

5G protocol developers can verify the beam tracking algorithm and protocols by connecting BBox™ and UD Box to the baseband instrument such as NI USRP.

With TMYTEK's beamtracking solution, telecom carriers now can do Far Field Assessment Simulation for 5G mobile base station without spending huge amounts of budget.
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In CATR, measuring dual-polarized antennas is common. By connecting dual polarity feed horn to our dual-channel UD Box can make the testing tasks easy.

Key Features

  • RF: 24-44 GHz; IF: 0.01- 14 GHz
  • Built-in LO with precise OCXO
  • 10/100 MHz synchronization
  • Optional Accessories: BPFs for 5G NR
  • n257/n258/n260 bands; 0.01-40 GHz amplifier
Synchronization Available
tmytek udbox
LED Indicators
tmytek udbox
100 MHz
10 MHz

System Architectures

UD Box works seamlessly with most of the Sub-6 GHz instruments, including Communication Analyzer, Spectrum Analyzer, Signal Generator, and even Software Defined Radio (SDR). Below charts show how TMYTEK 5G UD Box works with these instruments.
UD Box(Dual) + VNA + DUT
UD Box(Dual) + VNA + DUT

RF Specifications

RF Frequency---GHz24---44
IF Frequency---GHz0.01---14
LO FrequencyControllableGHz16---32
LO Frequency Resolution---MHz---1---
Reference Clock Stability (OCXO)-30 ~ +70 degreeppb-50---50
Reference Clock Accuracy-30 ~ +70 degreeHz-30---30
LO Stable Time---min---30---
Conversion LossFull banddB915*20
RF to IF IsolationWith filter / No filterdB---60 / 18---
IF to LO IsolationWith filter / No filterdB---60 / 15---
Output P1dBUp conversion Tested at RF portdBm-10-5*-2
Input P1dBDown conversion Tested at RF portdBm410*12
Noise FigureFull banddB915*20
RF Return Loss---dB710---
IF Return Loss---dB510---
10 MHz Output PowerInternaldBm-3------
100 MHz Output PowerInternaldBm---4---
100 MHz Input PowerExternaldBm1---8
* Typical Condition: RF 28 GHz / LO 26 GHz

DC and Clock Specifications

DC Power ConsumptionWithout external DC power outputW---10.518
DC Supply Voltage---V---15---
DC Supply Current---A---3---
External DC Power OutputsSingle Channel
Dual Channel
Reference ClockOutMHz---10---
In / OutMHz---100---


“As an academic researcher focus on wireless communication/sensing and based on my interaction with members of the TMYTEK team, I feel confident in stating that they are the leading experts in mmWave phased ... Therefore, I strongly recommend TMYTEK as your mmWave, 5G, and B5G solution provider.” Link
Yao Zheng
Yao Zheng
University of Hawaiʻi at Mānoa
“For research, up-down conversion made us easy to connect the mmWave RF front end to baseband instrument. This greatly expedites the experiments to validate our algorithm.”
Prof. Li
Prof. Li
“Excellent service and product!“
Prof. Kuo
Prof. Kuo
National Taipei University

Information & Documentation


Does UD Box have internal local or external reference clock?
Our UD Box have internal reference clock. It is able to provide reference to our internal local oscillator which have adjustable frequency. We can also provide this 10 MHz reference clock output for synchronizing external instruments with our UD Box.
What is the purpose of UD Box software?
We have GUI and API available for developers to control the LO frequencies of the UD Box as well as channel and reference ON/OFF functions. Our GUI is called the TMXLAB Kit which integrates most of our products into a single user interface. On the other hand, API is made ready to help production line automation and research environment for more extensive controls.
What is the difference between single and dual UD Box?
Our UD Box have single channel and dual channel versions. The advantage and exclusive features are that you can use two single channel UD Boxes to do the non-coherent modulation and demodulation. One as transmitter (Tx) and one as receiver (Rx) for long distance propagation measurement. Dual channel can be used when you have compact space requirement or you don’t have distance requirement, such as using it in an anechoic chamber.
Is UD Box tied to specific instruments? If so, what are the list of instruments it is compatible with?
No, UD Box is not tied to any brand/instruments. It is compatible with almost all types of signal generators and analyzers available on the market. Please consult us if you would like to make sure if UD Box is compatible with your current application scenario and existing instrument.
Can UD Box convert IQ baseband signal to mmWave? Is it bi-directional?
UD Box doesn’t have ADC/DAC. It converts IF and RF signal in a bi-directional way. We currently don’t have IQ product but it is customizable.
Which frequency bands does UD Box cover for 5G communications (i.e. n257, n260…)?
UD Box RF frequency ranges from 24 to 44 GHz which covers all of the 5G RF2 frequency bands from n257 to n261.
I didn’t see any filter at the RF port for image rejection in the datasheet schematic. Is image from the IF conversion rejected by filter in the UD Box?
UD Box is a broadband device so the image rejection filter is not built-in. We have optional filters that you can choose to filter the unwanted signals or we can design customized filter to fulfill the band you are interested in.
Can I use your amplifier together with UD Box via cable connection?
UD Box is a passive module. You can choose to add our optional amplifier to work with the UD Box.
What is the instantaneous bandwidth (IBW) of UD Box?
Our UD Box IF is from 0.01 to 14 GHz. The instantaneous bandwidth depends on the testing equipment and the testing signal type and conditions. For reference, in 5G communication testing, we have tested using 5G NR FR1 protocol 64 QAM on LitePoint’s IQxtream-5G. The instantaneous bandwidth still maintaining a good EVM (3%) is around 100 MHz. On the other hand, we have also tested 4K video streaming using NI’s MTS system. A bandwidth of 800 MHz is used while maintaining a throughput of over 2.8 Gbps and a EVM of 3%.
Can UD Box work with Vector Network Analyzers for S21 measurements?
Yes, our UD Box along with our VNA Cal-Kit can upgrade lower class/frequency VNA to high frequencies for S21 measurements.
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