RF Filters
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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:- RF band-pass filter: selects only a desired band of frequencies
- RF band-stop filter: eliminates an undesired band of frequencies
- RF low-pass filter: allows only frequencies below a cutoff frequency to pass
- 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.
Manufacturer Part No | Newark Part No. | Description / Manufacturer | Availability | Price for: |
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Quantity | Filter Type | No. of Pins | Pass Band Frequency | RF Filter Applications | Filter Case Style | Product Range | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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BPF900A
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23T4566 |
Filter, Band Pass, 902MHz to 928MHz L-COM
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Band Pass | - | 902MHz a 928MHz | GSM, ISM, RFID, RF, SCADA | - | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
BPF24-801A
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23T4550 |
BAND PASS FILTER, 2.4GHZ, 8 POLE L-COM
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BPF.24.01
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36AJ3162 |
BAND PASS FILTER, 2.4 - 2.5 GHZ ROHS COMPLIANT: YES TAOGLAS
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Band Pass | - | 2.4GHz to 2.5GHz | UAV/Drone Antennas | - | Airvu | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
BPF.58.01
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36AJ3163 |
BAND PASS FILTER, 5.48 - 5.85 GHZ ROHS COMPLIANT: YES TAOGLAS
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2450LP14B100T
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41T1689 |
LOW PASS FILTER, 2.45GHZ JOHANSON TECHNOLOGY
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2450LP14B100T
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21M6552 |
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748323024
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75AJ2939 |
RF FILTER, BAND PASS, 2.4GHZ TO 2.5GHZ ROHS COMPLIANT: YES WURTH ELEKTRONIK
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Band Pass | 4Pins | 2.4GHz to 2.5GHz | RF, Wireless Communication Systems Like DECT, PACS, PHS, GSM, WLAN, Bluetooth | 0805 [2012 Metric] | WE-BPF | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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748323155
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75AJ2941 |
RF FILTER, BAND PASS, 0805 ROHS COMPLIANT: YES WURTH ELEKTRONIK
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Band Pass | 4Pins | 5.15GHz to 5.875GHz | RF, Wireless Communication Systems Like DECT, PACS, PHS, GSM, WLAN, Bluetooth | 0805 [2012 Metric] | WE-BPF | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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748111009
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75AJ2935 |
RF FILTER, LOW PASS, 908MHZ TO 928MHZ ROHS COMPLIANT: YES WURTH ELEKTRONIK
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Low Pass | 8Pins | 908MHz to 928MHz | RF, Wireless Communication Systems Like DECT, PACS, PHS, GSM, WLAN, Bluetooth | 0805 [2012 Metric] | WE-LPF | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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FI105L250014-T
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54T9222 |
Multilayer Filter, Low Pass, 4 Pins, 2.4GHz to 2.5GHz, 0402 [1005 Metric] TAIYO YUDEN
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LP0603A0947ANTR
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36K5639 |
Filter, Low Pass, 4 Pins, 935MHz to 960MHz, 0603 [1608 Metric] KYOCERA AVX
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0915LP15B026E
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41T0902 |
Filter, Low Pass, 8 Pins, 902MHz a 928MHz, 0805 [2012 Metric] JOHANSON TECHNOLOGY
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DEA100915LT-6319A1
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29AJ5129 |
RF FILTER, LOW PASS, 824MHZ TO 915MHZ ROHS COMPLIANT: YES TDK
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FI105B245024-T
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46T5708 |
Multilayer Filter, Band Pass, 4 Pins, 2.4GHz to 2.5GHz, 0402 [1005 Metric] TAIYO YUDEN
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FI212B190223-T
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05R7234 |
Filter, Band Pass, 4 Pins, 1.884GHz to 1.93GHz, 0805 [2012 Metric] TAIYO YUDEN
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LP0603A2140ANTR
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55K6852 |
LOW PASS FILTER, 2170MHZ, FULL REEL KYOCERA AVX
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FI212B396001-T
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83T0126 |
Filter, Band Pass, 4 Pins, 3.168GHz to 4.752GHz, 0805 [2012 Metric] TAIYO YUDEN
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2450BP15E0100E
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44W4474 |
FILTER, BANDPASS, 2.4GHZ JOHANSON TECHNOLOGY
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5515BP15B975E
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11N6623 |
RF Filter, Band Pass, 4 Pins, 4.9GHz to 5.875GHz, 0805 [2012 Metric] JOHANSON TECHNOLOGY
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3600BP15M600E
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66AH5019 |
BAND PASS FILTER, 3.3-3.9GHZ, 0805 JOHANSON TECHNOLOGY
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DEA162450BT-1298A1
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29AJ5142 |
RF FILTER, BAND PASS, 2.4GHZ TO 2.5GHZ ROHS COMPLIANT: YES TDK
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FI212B190223-T
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83T0125 |
Filter, Band Pass, 4 Pins, 1.884GHz to 1.93GHz, 0805 [2012 Metric] TAIYO YUDEN
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1575CH15A0030E
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46W1429 |
Splitter, Band Pass, 4 Pins, 1.56GHz to 1.59GHz, 0805 [2012 Metric] JOHANSON TECHNOLOGY
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1575CH15A0030E
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55T4135 |
Splitter, Band Pass, 4 Pins, 1.56GHz to 1.59GHz, 0805 [2012 Metric] JOHANSON TECHNOLOGY
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FI105B245024-T
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46T5709 |
Multilayer Filter, Band Pass, 4 Pins, 2.4GHz to 2.5GHz, 0402 [1005 Metric] TAIYO YUDEN
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