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Tunable RF filters are commonly used in various lab environments for testing many frequency bands that include WiFi, UHF, PMR, Tetra, PCS and LTE. Tunable notch filters or band-rejection filters are an excellent solution for band selection or frequency discrimination with high attenuation greater than 50 dB. This allows you to achieve excellent noise, harmonic and adjacent-band reduction.
Tunable filters are useful for other environments as well, such as medical, military and commercial applications and implementations. This demand for various applications is driving the growth for tunable filter markets. However, the growth of tunable filter market growth is still limited due to factors such as high initial cost and R&D expenses.
Tunable filters are commonly used by RF engineers in EMC/ wireless test environments in order to ensure that the systems are operating efficiently in a crowded RF/microwave spectrum environment. They are extremely useful for rejecting unwanted interference and pre-tuning desired signals.
All key military communications and surveillance platforms around the world make use of tunable filters. They are useful for performing high-quality communications based on requirements during harsh environmental conditions and critical performances. Military applications need communication and surveillance systems with electromagnetic and environmental capability, nuclear resistance, and electrical characteristics of digital interfaces (Brunner, NB Herard, THE TUNABLE FILTER MARKET IS ESTIMATED TO GROW FROM USD 122.0 MILLION IN 2017 TO USD 203.1 MILLION BY 2023, AT A CAGR OF 8.86% BETWEEN 2017 AND 2023, 2018). Due to this military applications held some of the largest shares of the tunable market in 2016.
A tunable notch filter could be useful in a demanding environment such as laboratories that need exact and accurate results and measurements. Tunable notch filter or band reject filters are useful for providing rejection of high power blockers with large frequency tuning range (Klumperink, 8-Path Tunable RF Notch Filters for Blocker Suppression, 2012).
In medical environment tunable notch filter or band reject filters are useful for operating machines such as the electrocardiogram (ECG) machines that help conduct hassle free operations.
Tunable filters are useful in public address systems or speakers for ensuring quality audio without interruptions. They are also useful in telephone technologies for reducing line noise and in internet services for cancelling out any type of interference as much as possible. There are various other commercial applications such as radio devices, optical communication technologies etc.
With the rapid adoption of wireless communication technologies by various countries including India and China, the growth of the tunable filter market seems to be pacing at an immense speed by 2023.
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