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Crystal Filters

Crystal filters are electronic filters that are used in RF and microwave communication systems to selectively filter out unwanted frequencies from a signal. They are designed to provide a high level of selectivity and precision in filtering, making them ideal for use in applications where accurate frequency response is critical.

Crystal filters use a quartz crystal resonator to selectively filter out specific frequencies from a signal. The quartz crystal is typically cut and polished to resonate at a specific frequency or range of frequencies. When a signal is applied to the crystal, it vibrates at its resonant frequency and filters out all other frequencies.

Crystal filters can be designed as band-pass filters, which allow only a specific range of frequencies to pass through, or as band-stop filters, which block a specific range of frequencies. They can also be designed with multiple crystals, which can increase the level of selectivity and precision in filtering.

Crystal filters are commonly used in a variety of RF and microwave communication systems, including radios, satellite communication systems, and radar systems. They are also used in scientific research applications, such as particle accelerators and radio telescopes.

Crystal Filters

Available Parts 2

Part# Info Specs
Part RoHS Manufacturer Description Additional Features Maximum Attenuation Frequency (± Δf) Attenuation At Maximum Frequency Bandwidth (± Δf) Center/Cutoff Frequency (fo/fc) Construction Filter Type Height I/O Impedance Maximum Insertion Loss Length Mounting Type No. of Functions No. of Terminals Maximum Operating Temperature Minimum Operating Temperature Dimensions Width (mm)
ECS-21K30B by Ecs International

ECS-21K30B

Ecs International

ECS-21K30B by Ecs International is a MONOLITHIC CRYSTAL FILTER with 3 terminals. It offers 50 dB attenuation at max frequency of 21.4 MHz, with a max insertion loss of 2 dB. Ideal for applications requiring precise filtering in temperature range -20 to 70 °C, I/O impedance of 1800 OHM//0.5 and bandwidth of ±15 kHz.

4 POLE

40 kHz

50 dB

15 kHz

21.4 MHz

MONOLITHIC

CRYSTAL FILTER

8 mm

1800 OHM//0.5

2 dB

7.3 mm

THROUGH HOLE MOUNT

1

3

70 Cel

-20 Cel

L7.3XB2.5XH8.0 (mm)/L0.287XB0.098XH0.315 (inch)

2.5

ECS-38SMF45A15 by Ecs International

ECS-38SMF45A15

Ecs International

ECS-38SMF45A15 by Ecs International is a monolithic crystal filter with 8 terminals, offering 25 dB attenuation at 45 MHz. With a compact size of L3.8xB3.8xH1.0 mm, it has a max insertion loss of 2 dB and bandwidth of ±7.5 kHz. Ideal for applications requiring precise frequency filtering in limited space environments.

TAPE AND REEL; 2 POLE

13 kHz

25 dB

7.5 kHz

45 MHz

MONOLITHIC

CRYSTAL FILTER

1 mm

560 OHM//6

2 dB

3.8 mm

SURFACE MOUNT

1

8

80 Cel

-30 Cel

L3.8XB3.8XH1.0 (mm)/L0.15XB0.15XH0.039 (inch)

3.8