Series:	5HT
Packaging:	Bulk
Part Status:	Obsolete
Frequency - Center:	655MHz
Bandwidth:	12MHz
Selectivity:	26dB (+50MHz) 30dB (-50MHz)
Ripple:	1dB
Insertion Loss:	4dB
Mounting Type:	Through Hole

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Helical Filters

5HT-65550F-655 Application Field and Working Principle

Helical filters are a type of filter widely used in telecommunications applications. They are based on the principle of wave division multiplexing, which allows multiple signals from multiple sources to be jointly transmitted on the same physical link. Filters are used to limit the power of each signal to a specific frequency band, enabling the signals from multiple sources to be multiplexed without interference.
The 5HT-65550F-655 helical filter is a compact receiver filter designed for the 69 GHz frequency range in 5G wireless communication applications. It offers low insertion loss, high isolation, and high return loss, thus ensuring that the receive signal level is stable, and allows for high signal fidelity across the entire frequency range.
Working Principle
The 5HT-65550F-655 helical filter is based on a diplexer design, tracking two separate transmission paths between input and output. The filter utilizes printed circuit board (PCB) inductors and capacitors to form an inductive-capacitive (LC) filter, which can effectively pass signals of a predetermined frequency. The LC filter consists of a series of inductors and capacitors arranged in a helical pattern which is connected to the signal path. The inductors and capacitors act as electrical “blocks” that restrict the flow of current to a specific frequency.
In the case of the 5HT-65550F-655 helical filter, the filter will allow signals of frequencies between 69GHz to pass through with minimal loss, while significantly attenuating any signals of unwanted frequencies. The 5HT-65550F-655 helical filter also features a surface mount design, making the device compact and easy to install.
Application Field
The 5HT-65550F-655 helical filter is commonly used in 5G microwave communications systems, where it serves as a receiver filter. Its low insertion loss, high isolation, and high return loss properties make it an ideal choice for applications requiring significant bandwidth and signal voltage levels.
The filter is also widely used in equipment such as high-data-rate radio modems, point-to-point microwave links, and Digital Video Broadcasting systems (DVB). Due to its wide frequency range, low insertion loss, and high return loss, the 5HT-65550F-655 helical filter can be used in a variety of applications requiring superior signal fidelity and prolonged periods of stable operation.
Conclusion
In conclusion, the 5HT-65550F-655 helical filter is an ideal choice for a wide variety of applications requiring low insertion loss, high isolation, and high return loss. The filter\'s compact design allows for easy installation and reliable performance in a range of 5G wireless communication systems.

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