VHF Helical Filter(136-174MHz, N Female)
Like the ceramic coaxial filter, the helical filter uses a combination of lumped and distributed elements. However, unlike that filter, it uses inductors to couple energy from one element to another and does so via air gaps. The helical filter has low insertion loss, is relatively large, and can handle up to 100 W and more due to its use of inductors; higher-power units use tubing instead of wire and can go into the kW range. Q is very high, up to about 1000, but so is their relative cost.
Topwave model TPW-HF-1374-NF, a typical VHF bandpass Helical filter with low insertion loss and good rejection. Such low bandpass filter widely in LNA and BDA systems, also it is a customize product. Topwave telecom is willing to provide ODM service according to your solutions and systems.
·Low Frequency Band Covering 136-174MHz
·Low Insertion Loss
·Low VSWR
·Indoor Using IP60
·Available with Type N, 7/16DIN or 4.3/10 Type Connectors
| Electrical & Mechanical Specifications |
| Model No. |
TPW-HF-1374-NF |
| Tunable Frequency Range(MHz) |
136-174MHz |
| Bandwidth(MHz) |
±1MHz |
| Insertion Loss(dB) |
≤2.0 |
| VSWR |
≤1.3 |
| Rejection @ ±5MHz(dB) |
≥35 |
| Power Rating(W) |
50W(max) |
| Impedance |
50 ohm |
| Connector |
N & BNC & SMA Female |
| Color |
Black |
| Operating Temperature(ºC) |
-20~+50°C |
| Relative Humidity |
5%-95% |
| Dimensions(mm) |
See Mechanical Drawing |
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Hefei Topwave Telecom Co.,Ltd, is a worldwide leading provider of comprehensive RF passive equipment and high-performance wireless infrastructure solutions focused on innovation and differentiation at the edge of wireless telecommunication networks.
Topwave Telecom established in 2007, located in Hefei National High-tech Zone. With the decades of development, we have our own R&D center and manufacturer center.We are OEM and ODM service provider and network operators to improve performance and reduce operating expenses via comprehensive set of products and solutions. Topwave has more than 10 years experience to export goods to all over the world, the RF passive devices like power splitter, coupler, filter, multiband combiner etc, which widely used for DAS, IBS, BTS and BDA.
Topwave persist to provide excellent products and service for every client as always. Our mission is to make the world connected, make the world small, and make the world smart. Topwave Telecom, your trusted strategic business partner, your RF expert in telecommunication.
Q: Can I get smaples for validation test?
A: Let's talk, some samples are free but shipping charge should be on your account.
Q: What is your MOQ?
A: We don't have MOQ limit.
Q: What is your payment terms?
A: We accept Western Union, T/T, Paypal and so on.
Q: What is your delievry time?
A: Normally around 2 weeks, TBD for massive quantity or customized products.
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