RF Filters

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We offer RF filters for aircraft, aerospace, medical, power plant control, traffic signal, transportation equipment and a wide range of other applications.

Radio frequency (RF) and microwave filters represent a class of electronic filter, designed to operate on signals in the megahertz to gigahertz frequency ranges (medium frequency to extremely high frequency). This frequency range is used by most broadcast radio, television, and wireless communication equipment (mobile phones, Wi-Fi, etc.).

Accordingly, most RF and microwave devices will include some kind of filtering on the signals transmitted or received. Such filters are commonly used as building blocks for duplexers and diplexers to combine or separate multiple frequency bands.

What does an RF filter do?

Filters fulfil one of the following functions:
  1. RF band-pass filter: selects only a desired band of frequencies
  2. RF band-stop filter: eliminates an undesired band of frequencies
  3. RF low-pass filter: allows only frequencies below a cutoff frequency to pass
  4. RF high-pass filter: allows only frequencies above a cutoff frequency to pass

RF Filter types

There are many different types or models for RF filters. Below are some of the more commonly used forms.

Constant-k: The constant-k filter’s advantage lies in the ease of calculating values for the various components. This enables it to be simply designed with minimal theoretical knowledge about the mathematics, unlike many other filters. However, its performance does not quite match that of other filter types, although for many applications it is more than adequate.

Butterworth: This type of filter provides the maximum in band flatness, although it provides a lower stop-band attenuation than a Chebyshev filter. However, it is also able to provide better group delay performance, and hence lower overshoot.

Bessel: This filter provides the optimum in-band phase response and therefore also provides the best step response. It is often used where signals incorporate square waves, etc as the shape is maintained best of all.

Chebyshev: This filter provides fast roll off after the cut off frequency is reached. However, this is at the expense of in-band ripple. The more in-band ripple that can be tolerated, the faster the roll off.

Elliptic: This filter, also known as the Cauer filter, has significant levels of in-band and out of band ripple, and as expected the higher the degree of ripple that can be tolerated, the steeper it reaches its ultimate roll off.
 
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LFD21868MMF1D386
LFD21868MMF1D386 - RF Filter, Balun, 891.5 Mhz,3W, -40℃ to 85℃, 0805 [2012 Metric], LFD21 Series

2913685

RF Filter, Balun, 891.5 Mhz,3W, -40℃ to 85℃, 0805 [2012 Metric], LFD21 Series

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748351124
748351124 - RF Filter, Multilayer Chip Band-Pass, 2.4 GHz to 2.5 GHz, 1008

3517042

RF Filter, Multilayer Chip Band-Pass, 2.4 GHz to 2.5 GHz, 1008

WURTH ELEKTRONIK

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2450BP15E0100E
2450BP15E0100E - Filter, Band Pass, 4 Pins, 2.4GHz to 2.5GHz, 0805 [2012 Metric]

2148528

Filter, Band Pass, 4 Pins, 2.4GHz to 2.5GHz, 0805 [2012 Metric]

JOHANSON TECHNOLOGY

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MLPF-WB55-02E3
MLPF-WB55-02E3 - RF FILTER, LOW PASS, 2.4 TO 2.5GHZ, CSP

3387267

RF FILTER, LOW PASS, 2.4 TO 2.5GHZ, CSP

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MLPF-WB55-02E3
MLPF-WB55-02E3 - RF FILTER, LOW PASS, 2.4 TO 2.5GHZ, CSP

3387267RL

RF FILTER, LOW PASS, 2.4 TO 2.5GHZ, CSP

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748351124
748351124 - RF Filter, Multilayer Chip Band-Pass, 2.4 GHz to 2.5 GHz, 1008

3517042RL

RF Filter, Multilayer Chip Band-Pass, 2.4 GHz to 2.5 GHz, 1008

WURTH ELEKTRONIK

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2450BP15E0100E
2450BP15E0100E - Filter, Band Pass, 4 Pins, 2.4GHz to 2.5GHz, 0805 [2012 Metric]

2148528RL

Filter, Band Pass, 4 Pins, 2.4GHz to 2.5GHz, 0805 [2012 Metric]

JOHANSON TECHNOLOGY

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0868LP15A020E
0868LP15A020E - Filter, Low Pass, 8 Pins, 858MHz to 878MHz, 0805 [2012 Metric]

2148529

Filter, Low Pass, 8 Pins, 858MHz to 878MHz, 0805 [2012 Metric]

JOHANSON TECHNOLOGY

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MLPF-WB55-01E3
MLPF-WB55-01E3 - RF Filter, 2.4GHz, Low Pass, Impedance Matched To STM32WB55

3106011

RF Filter, 2.4GHz, Low Pass, Impedance Matched To STM32WB55

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BPF.58.01
BPF.58.01 - Filter, Band Pass, 5.48 GHz to 5.85 GHz, 2.1 dB, 50 Ohm

3678601

Filter, Band Pass, 5.48 GHz to 5.85 GHz, 2.1 dB, 50 Ohm

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Band Pass - 5.48GHz to 5.85GHz UAV/Drone Antennas - Airvu
2450LP14B100T
2450LP14B100T - Filter, Low Pass, 6 Pins, 2.4GHz to 2.5GHz, 0603 [1608 Metric]

1885521

Filter, Low Pass, 6 Pins, 2.4GHz to 2.5GHz, 0603 [1608 Metric]

JOHANSON TECHNOLOGY

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BPF.24.01
BPF.24.01 - Filter, Band Pass, 2.4 GHz to 2.5 GHz, 1.3 dB, 50 ohm

3678599

Filter, Band Pass, 2.4 GHz to 2.5 GHz, 1.3 dB, 50 ohm

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Band Pass - 2.4GHz to 2.5GHz UAV/Drone Antennas - Airvu
DLF162500LT-5028A1
DLF162500LT-5028A1 - RF Filter, Low Pass, 2.4 GHz to 2.5 GHz, 0603

3650703

RF Filter, Low Pass, 2.4 GHz to 2.5 GHz, 0603

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Low Pass 4Pins 2.4GHz to 2.5GHz Bluetooth, WLAN 0603 [1608 Metric] -
0868LP15A020E
0868LP15A020E - Filter, Low Pass, 8 Pins, 858MHz to 878MHz, 0805 [2012 Metric]

2148529RL

Filter, Low Pass, 8 Pins, 858MHz to 878MHz, 0805 [2012 Metric]

JOHANSON TECHNOLOGY

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MLPF-WB55-01E3
MLPF-WB55-01E3 - RF Filter, 2.4GHz, Low Pass, Impedance Matched To STM32WB55

3106011RL

RF Filter, 2.4GHz, Low Pass, Impedance Matched To STM32WB55

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DEA102700LT-6307A2
DEA102700LT-6307A2 - RF Filter, Low Pass, 2.4 GHz to 2.7 GHz, 0402

3650678

RF Filter, Low Pass, 2.4 GHz to 2.7 GHz, 0402

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DEA160960LT-5059A1
DEA160960LT-5059A1 - RF Filter, Low Pass, 698 MHz to 960 MHz, 0603

3650684

RF Filter, Low Pass, 698 MHz to 960 MHz, 0603

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HHM22137A2
HHM22137A2 - RF Filter, Coupler, 698 MHz to 2.62 GHz, 0603

3650673

RF Filter, Coupler, 698 MHz to 2.62 GHz, 0603

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DEA162450BT-1295A1
DEA162450BT-1295A1 - RF Filter, Band Pass, 2.4 GHz to 2.5 GHz, 0603

3650690

RF Filter, Band Pass, 2.4 GHz to 2.5 GHz, 0603

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LQZ02HQ242A02E
LQZ02HQ242A02E - CHIP LC TRAP FILTER, 2.4-2.5GHZ, 01005

3228016

CHIP LC TRAP FILTER, 2.4-2.5GHZ, 01005

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LC 2Pins 2.4GHz ~ 2.5GHz Aircraft, Aerospace, Medical, Power Plant Control, Traffic Signal & Transportation Equipment 01005 [0402 Metric] LQZ02HQ
LQZ02HQ242A02E
LQZ02HQ242A02E - CHIP LC TRAP FILTER, 2.4-2.5GHZ, 01005

3228016RL

CHIP LC TRAP FILTER, 2.4-2.5GHZ, 01005

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LC 2Pins 2.4GHz ~ 2.5GHz Aircraft, Aerospace, Medical, Power Plant Control, Traffic Signal & Transportation Equipment 01005 [0402 Metric] LQZ02HQ
DEA160787LT-5032A1
DEA160787LT-5032A1 - RF Filter, Low Pass, 470 MHz to 787 MHz, 0603

3650683

RF Filter, Low Pass, 470 MHz to 787 MHz, 0603

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Low Pass 6Pins 470MHz to 787MHz LTE Band13 0603 [1608 Metric] -
HHM22139A2
HHM22139A2 - RF Filter, Coupler, 698 MHz to 2.62 GHz, 0603

3650675

RF Filter, Coupler, 698 MHz to 2.62 GHz, 0603

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DEA163800LT-5017C1
DEA163800LT-5017C1 - RF Filter, Low Pass, 3.3 GHz to 3.8 GHz, 0603

3650695RL

RF Filter, Low Pass, 3.3 GHz to 3.8 GHz, 0603

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Low Pass 6Pins 3.3GHz to 3.8GHz WiMAX 0603 [1608 Metric] -
DEA163800LT-5017C1
DEA163800LT-5017C1 - RF Filter, Low Pass, 3.3 GHz to 3.8 GHz, 0603

3650695

RF Filter, Low Pass, 3.3 GHz to 3.8 GHz, 0603

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