Category Archives: Products

Low Passive Intermodulation Filter Products for Distributed Antenna Systems

Distributive Antenna System (DAS) allows additional wireless coverage without the cost of expensive infrastructure, 3H Communication Systems offers a complete line of catalog and custom filter products for today’s growing DAS infrastructure. Our DAS products offer high power and low Passive Inter-modulation (PIM) performance. 3H Communication Systems offers a complete line of low Passive Inter-modulation filters for the DAS market including the following band:

RF CAVITY FILTER DIPLEXER

TRIPLEXER/DUPLEXER, LOW PIM, 698-716/728-757/776-787 MHZ

Product Specification Table1

* Note: PIM specification is 2 x 20 watt tones input to the antenna port measuring in the reflective mode. Also available in 2 x 40 w.

**Note, PIM performance varies from type N vs. 7/16th connector.

700plotandBlock

Duplexer, Low PIM, Band 5, 824 to 849/869 to 894 MHz

Band5 Specs 3H Communication Systems

* Note: PIM specification is 2 x 20 watt tones input to the antenna port measuring in the reflective mode. Also available in 2 x 40 w. **Note, PIM performance varies from type N vs. 7/16th connector. band5plot

Duplexer, Low PIM, AWS 1710 to 1755/2110 to 2170 MHz

AWS Spec 3H Communication Systems

* Note: PIM specification is 2 x 20 watt tones input to the antenna port measuring in the reflective mode. Also available in 2 x 40 w.

**Note, PIM performance varies from type N vs. 7/16th connector.

AWSplot

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Duplexer, Low PIM, Band 2, PCS, 1850 to 1915/1930 to 1995 MHz

PCS Spec 3H Communication Systems

* Note: PIM specification is 2 x 20 watt tones input to the antenna port measuring in the reflective mode. Also available in 2 x 40 w.

**Note, PIM performance varies from type N vs. 7/16th connector.

PCSPlotandblock

Duplexer, Low PIM, SMR 806 to 824/851 to 869 MHz

SMR Spec 3H Communication Systems

* Note: PIM specification is 2 x 20 watt tones input to the antenna port measuring in the reflective mode. Also available in 2 x 40 w.

**Note, PIM performance varies from type N vs. 7/16th connector.

SMRPlot

Other custom PIM products are available; please contact us for more information.

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TOWER MOUNTED AMPLIFIERS (TMA)

3H offers custom TMA designes for various configurations. The TMA’s are designed to withstand years of harsh environmental conditions with IP68 ratings.

Due to different rejection critiria and specified size limits, the noise figure and the Tx band insertion loss are designed to be as best as possible with given the constraints. Certain bands can have inserton loss as low as possible even around 0.2 dB and up.

TMAs 3H Communication Systems

 

TMA Block Diagram1

TMA Block Diagram2

Typical TMA specifications are given below:

TxF1 = Transmit band lower frequency

TxF2 = Transmit band higher frequency

RxF1 = Receive band lower frequency

RxF2 = Receive band higher frequency

TMA Specifications 3H Communication Systems

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Cavity Filter Products

3H offers a full line of cavity filter products including filters, multiplexers and multi-functions assemblies. Our cavity filters offer high Q and low insertion loss with high out of band rejections in the smallest possible size. Available in connectorized or SMT packages. High power options are also available.
• Frequency Range: 40 MHz to 40 GHz.
• Bandwidths: 0.2 to 70% (available in 0.5, 1.0, 3.0 dB or equal-ripple bandwidths).
• Generalized Chebyshev Response with cross couplings. Other responses available, i.e. group delay equalization.
• Available with Connectors and SMT.
• Available with High Power Options, up to 30 kW PEP.
• Mil-Std-202 Conditions.
• Designs can be optimized for IM performance.

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