Spring Technologies
  • ABOUT
  • APPLICATIONS
    • General Purpose
      • Liquid Instrument
      • Microtest
      • Rigol
      • Tekbox
    • GPS/GNSS Simulator
      • LabSat
    • Land Mobile Radio
      • Freedom
    • RF and Microwave
      • Aaronia
      • Anapico
      • Anritsu
      • Boonton
      • Consultix
      • Noisecom
    • Time and Frequency
      • Protempis
  • SERVICES
    • Equipment Rental
    • Calibration
    • Repair
  • LIBRARY
    • General Purpose
      • Liquid Instrument
      • Microtest
      • Rigol
      • Tekbox
    • GPS/GNSS Simulator
      • LabSat
    • Land Mobile Radio
      • Freedom
    • RF and Microwave
      • Aaronia
      • Anapico
      • Anritsu
      • Boonton
      • Consultix
      • Noisecom
    • Time and Frequency
      • Protempis
  • CONTACT
Menu
Spring Technologies
Click to enlarge
HomeAll Products Tekbox OPEN TEM CELLS FOR EMC PRE-COMPLIANCE TESTING
Previous product
Tekbox TBLC08 50UH LINE IMPEDANCE STABILISATION NETWORK LISN – CISPR 16
Back to products
Next product
Microtest 8740 Cable Tester-2 Wire
Tekbox

Tekbox OPEN TEM CELLS FOR EMC PRE-COMPLIANCE TESTING

Radiated emission tests are typically carried out in anechoic chambers, using antennas to pick up the radiated signals. Due to bandwidth limitations, several antennas are required to cover the complete frequency range. Furthermore, it requires much space and the cost of the equipment for a standard conformant setup is immense.
An engineer of a small or medium size enterprise usually has to rely on his experience and on best practice methods in order to design an EMC compliant product. Nevertheless, it is estimated that > 50% of products fail testing first time around. Anytime an engineer sends a new product for compliance testing, it is a shot in the dark. Failing is very expensive. Not only that re-testing costs are high, but also the project schedule and market introduction gets delayed.
What is needed is an affordable laboratory set up to measure radiated emissions in the own lab, prior to compliance testing. A TEM cell is the right piece of equipment for desktop testing of radiated emissions. Tekbox developed open TEM cells to cover the complete frequency range up to 2GHz and with usability even at frequencies beyond.
Combined with a spectrum analyzer, products can be tested before and after EMC related design modifications. A set up with a TEM cell will not deliver exactly the same quantitative results as a measurement in a certified test house, however it will give an excellent indication on whether the design suffers from excessive radiated noise or not. The engineer will clearly see, whether his changes improved or deteriorated the EMC performance or whether it remained unchanged. Using TEM cells eliminates the guesswork.

A TEM cell is a stripline device for radiated emissions and immunity testing of electronic devices. It is not a replacement, but due to its size and cost it is a convenient alternative to measurements in an anechoic chamber.

A TEM cell consists of a septum, the conductive strip in the centre section and walls which are connected to ground. The geometry is designed to present a 50Ω stripline. The device under test (DUT) is placed in between the bottom wall and the septum.

The TBTC1/2/3 are so called “open TEM cells”, which got no side walls for convenient placement of the DUT. It may pick up RF background noise, which however can be taken into account by doing a measurement of the cell output signal before powering on the DUT.

Tekbox open TEM cells got a better frequency response compared to standard TEM cells of similar size. TEM cells suffer from higher order wave modes which limit the usable bandwidth. A unique design feature of the Tekbox TEM cells implements resistance perpendicular to the desired propagation direction of the wave. Consequently higher order wave modes and resonances are suppressed.
All TEM cells are supplied together with a 50Ω/25W RF termination, a DC block to protect the spectrum analyzer or RF receiver input and a N-Male to N-Male coaxial cable.

Download Datasheet
Let us know who you are!


    GET QUOTE

      Categories: All Products, TEM Cells
      • Description
      • Additional information
      • About brand
      Description

      SPECIFICATIONS

      TBTC0 TEM cell dimensions:
      Length: 390 mm
      Width: 100 mm
      Height: 62 mm
      Septum height: 28 mm

      Rectangular area under the septum: 19 cm x 7 cm x 2,8 cm

      TEM cell connectors: N-female
      Nominal cell impedance: 
      50 Ohm
      Wave impedance: 
      377 Ohm
      Maximum RF input power: 
      10W (limited by supplied 50 Ohm Termination)
      Input return loss: 
      S11 up to 3.15 GHz < -15dB
      Transmission loss: 
      up to 3 GHz < 3dB, up to 6 GHz < 4dB

      TBTC1 TEM cell dimensions:
      Length: 390 mm
      Width: 200 mm
      Height: 108 mm
      Septum height: 50 mm

      Rectangular area under the septum: 19 cm x 13 cm x 5 cm

      TEM cell connectors: N-female
      Nominal cell impedance: 
      50 Ohm
      Wave impedance: 
      377 Ohm
      Maximum RF input power: 
      25W (limited by supplied 50 Ohm Termination)
      Input return loss: 
      S11 up to 1.2 GHz < -20dB, up to 2.1 GHz < -17dB, up to 3GHz < -14dB
      Transmission loss: 
      up to 1.4 GHz < 1 dB, up to 2.1 GHz < 3dB, up to 3 GHz < 6dB

      TBTC2 TEM cell dimensions:
      Length: 636 mm
      Width: 300 mm
      Height: 205 mm
      Septum height: 100 mm

      Rectangular area under the septum: 23 cm x 28 cm x 10 cm

      TEM cell connectors: N-female
      Nominal cell impedance: 50 Ohm
      Wave impedance: 377 Ohm
      Maximum RF input power: 25W (limited by supplied 50 Ohm Termination)
      Input return loss: S11 up to 800 MHz < -15dB, up to 1.5 GHz < -10dB, up to 3GHz < -8dB
      Transmission loss: up to 800 MHz < 1 dB, up to 1.15 GHz < 3dB

      TBTC3 TEM cell dimensions:
      Length: 1038 mm
      Width: 501 mm
      Height: 305 mm
      Septum height: 150 mm

      Rectangular area under the septum: 36 cm x 48 cm x 15 cm

      TEM cell connectors: N-female
      Nominal cell impedance: 50 Ohm
      Wave impedance: 377 Ohm
      Maximum RF input power: 25W (limited by supplied 50 Ohm Termination)
      Input return loss: S11 up to 700 MHz < -16dB
      Transmission loss: up to 730 MHz < 3 dB

       

      DC-Block 50V-6GHz-N
      Connectors: N-Male/Female
      Nominal impedance: 50 Ohm
      Max. continuous RF power: 2W
      Max. continuous RF voltage: 50V RMS
      Frequency: 500kHz to 6 GHz
      VSWR: ≤ 1.2

      RF-Termination 50Ω-3GHz-25W-N
      Connector: N-Male
      Nominal impedance: 50 Ohm
      Max. continuous RF power: 25W
      Frequency: DC to 3 GHz
      VSWR: ≤ 1.2
      Third order intermodulation: ≤ 120 dBc

      Additional information
      Brand

      Tekbox

      About brand
      Tekbox was founded as a design services company in 2008. The main focus was the development of automotive lighting and fleet management products. In parallel, Tekbox started developing its own products for smart agriculture and environmental sensing. EMC pre-compliance testing was always considered an essential part during the design phase and resulted in elaborating suitable procedures and test equipment. EMC pre-compliance testing at Tekbox could considerably reduce time to market and product development cost. The positive response for an open hardware LISN design, shared with the engineering community, encouraged us to industrialize other test equipment, which we initially designed for our internal use. Meanwhile, Tekbox has become a popular brand for affordable EMC pre-compliance test equipment and continues to industrialize its range of test equipment. When still a design services company, Tekbox recognized, that in house manufacturing capabilities are essential to speed up product design. Meanwhile, Tekbox is very vertically integrated. Besides an experienced team of hardware, firmware and software engineers, we have grown a capable manufacturing department in house. SMT pick and place machines and experienced operators for manual assembly enable us to manufacture all our PCBAs in the Tekbox factory. Further capabilities are Technomelt molding, plastic injection, manual and CNC milling and turning, laser cutting and engraving and various other production processes.

      Related products

      Buy product
      Close

      Noisecom DSG9000 HD Radio Series

      Buy product
      Close

      Noisecom NC1000 Series Amplified Noise Modules

      Buy product
      Close

      Noisecom NBS-Series Cryogenic Primary Noise Standards

      Buy product
      Close

      Rigol DG900 Series High Resolution Arbitrary Waveform Generators With SiFi II Technology

      READ MORE
      Close

      Boonton 8201A Modulation Analyser

      Buy product
      Close

      Noisecom NC6000A/8000A Series Noise Generator

      Buy product
      Close

      Noisecom 60 GHZ Noise Figure Test Set

      Buy product
      Close

      Noisecom NC2000/4000 Series Broadband Amplified Noise Modules

      ABOUT US

      Helmed by experienced engineers with years of industry know-how on test equipment, Spring Technologies is your first choice.

      CONTACT US

      Address: 130 Joo Seng Road #05-02,
      Singapore 368357
      Contact: +65 6282 0337
      Email: ask@springtechnologies.com.sg

      ABOUT US

      Helmed by experienced engineers with years of industry know-how on test equipment, Spring Technologies is your first choice.

      CONTACT US

      Address: 130 Joo Seng Road #05-02,
      Singapore 368357
      Contact: +65 6282 0337
      Email: ask@springtechnologies.com.sg

      ABOUT US

      Helmed by experienced engineers with years of industry know-how on test equipment, Spring Technologies is your first choice.

      CONTACT US

      Address: 130 Joo Seng Road #05-02,
      Singapore 368357
      Contact: +65 6282 0337
      Email: ask@springtechnologies.com.sg
      © 2025 Spring Technologies Pte Ltd. Website crafted by Pixel Mechanics
      • ABOUT
      • APPLICATIONS
        • General Purpose
          • Liquid Instrument
          • Microtest
          • Rigol
          • Tekbox
        • GPS/GNSS Simulator
          • LabSat
        • Land Mobile Radio
          • Freedom
        • RF and Microwave
          • Aaronia
          • Anapico
          • Anritsu
          • Boonton
          • Consultix
          • Noisecom
        • Time and Frequency
          • Protempis
      • SERVICES
        • Equipment Rental
        • Calibration
        • Repair
      • LIBRARY
        • General Purpose
          • Liquid Instrument
          • Microtest
          • Rigol
          • Tekbox
        • GPS/GNSS Simulator
          • LabSat
        • Land Mobile Radio
          • Freedom
        • RF and Microwave
          • Aaronia
          • Anapico
          • Anritsu
          • Boonton
          • Consultix
          • Noisecom
        • Time and Frequency
          • Protempis
      • CONTACT
      Start typing to see products you are looking for.