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Products

Wideband Transformers

Wideband transformers couple signals magnetically from input to output terminals with optimum transmission reliability over broad frequency ranges. Major objectives in their use are:

  • Impedance matching for maximum power transfer
  • Coupling between unbalanced and balanced circuits (Baluns)
  • DC isolation between input and output
  • Ground Isolation for common mode rejection
  • Signal distribution and mixing

The following links were created in Adobe® Acrobat® PDF format. CLICK HERE to download the free Acrobat reader. The PDF files below are between 500kB and 1MB in size.
A comprehensive tutorial on Wideband Transformers can be found in Application Note 151: Wideband Transformers. A tutorial on Baluns is also available in Application Note 159.

General Purpose 1 kHz - 125 MHz

A complete line of balun transformers to match 50 and 75 ohm unbalanced circuits to a wide range of balanced impedances. North Hills offers three series with varying frequency ranges to cover a wide variety of applications.
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10-100W RF Power Series 0.1 - 30 MHz

Three series of 50 and 75 ohm baluns rated for 10, 25 and 100W.
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Extended Video 20 Hz - 6 MHz

A line of 50 and 75 ohm baluns with an extremely low (20) Hz frequency cut-off.
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PC Mount, 0.1-300 MHz

50, 75 and 90 ohm baluns and unbalanced to unbalanced devices in a compact printed circuit board mount package.
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Coaxial Impedance Adaptors

For matching 50, 75 and 90 ohm coaxial cables.
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Power Splitters and Combiners

50 and 75 ohm unbalanced and 100 balanced multiport hybrid transformers.
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Specialty Wideband Baluns:

High Frequency Wideband Baluns 5 MHz to 1.2 GHz

Ultra High Frequency 50 ohm to 100 ohm balun provides an easy and straightforward means of measuring circuit characteristics to 1.2 GHz.
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High Frequency SMPTE 292m Baluns 500 kHz To 1.5 GHz

Ultra High Frequency 75 ohm to 100 ohm baluns for use in SMPTE 292M HDTV video networks North Hills now manufactures RoHS compliant versions of our Wideband Transformers. To order a RoHS compliant Wideband Transformer simply add the letters LF at the end of the model number. For example:  North Hills balun transformer 0300BB-LF is a RoHS compliant product.
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High Frequency SMPTE 292M Micro Baluns to 1.5GHz

Ultra High Frequency 75 ohm to 100 ohm Micro Baluns for use in SMPTE 292M and 424M HDTV video networks.
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High Frequency SMPTE 292M Surface Mount Baluns to 1.5GHz

Ultra High Frequency 75 ohm to 100 ohm Suface Mount Baluns for use in SMPTE 292M and 424M HDTV video networks.
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Application Notes:

The North Hills Wideband On-line Store facilitates convenient quick-response purchases of our popular stock items.

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Download a Copy of Our Wideband Transformer Quick Reference Guide