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 | Order Code | 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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DEA163800LT-5017C1
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3650695 |
RF Filter, Low Pass, 3.3 GHz to 3.8 GHz, 0603 TDK
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Low Pass | 6Pins | 3.3GHz to 3.8GHz | WiMAX | 0603 [1608 Metric] | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DEA162025LT-5003C3
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3650685 |
RF Filter, Low Pass, 880 MHz to 2.025 GHz, 0603 TDK
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5+ ¥31.76 (¥34.94) 10+ ¥24.91 (¥27.40) 100+ ¥22.93 (¥25.22) |
Low Pass | 6Pins | 880MHz to 2.025GHz | GSM, LTE, UMTS, 5G | 0603 [1608 Metric] | DEA Series | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
748323155
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3812922 |
RF Filter, Band Pass, WE-BPF Series, 5.15 GHz to 5.875 GHz, 4 Pins, 0805 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 Series | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MLPF-WB-01E3
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3680093 |
RF Filters, 2.4 GHz - 2.5 GHz, Bumpless CSP-6, -40 °C to 105 °C STMICROELECTRONICS
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Low Pass | 6Pins | 2.4GHz to 2.5GHz | Bluetooth 5, IEEE 802.15.4, OpenThread, Optimized for STM32WB55Cx, Zigbee | Bumpless CSP | - | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
748323056
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3812921 |
RF Filter, Band Pass, WE-BPF Series, 4.9 GHz to 5.92 GHz, 4 Pins, 0805 WURTH ELEKTRONIK
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Band Pass | 4Pins | 4.9GHz to 5.92GHz | RF, Wireless Communication Systems Like DECT, PACS, PHS, GSM, WLAN, Bluetooth | 0805 [2012 Metric] | WE-BPF Series | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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DEA202450BT-3030A1
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3650702 |
RF Filter, Band Pass, 2.4 GHz to 2.5 GHz, 0805 TDK
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748351024
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3812925 |
RF Filter, Band Pass, WE-BPF Series, 2.4 GHz to 2.5 GHz, 4 Pins, 1008 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 | 1008 [2520 Metric] | WE-BPF Series | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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LFB2H2G45SG7A159
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1294716 |
FILTER, BANDPASS, 2.45GHZ MURATA
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Band Pass | 4Pins | 2.4GHz ~ 2.5GHz | Bluetooth, WLAN | 1008 [2520 Metric] | LFB Series | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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AFII-LC-0049
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4640360 |
Band Pass Filter, UWB, 6.2GHz to 7.8GHz, 3W, Surface Mount, 0805 [2012 Metric], 4-Pin ABRACON
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Band Pass | 4Pins | 6.2GHz to 7.8GHz | - | 0805 [2012 Metric] | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
BPF2012LKBMR6580A
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4453935 |
2012 UWB BPF TYPEBM, 6240~8240 PULSE ELECTRONICS
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BPF24-806
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4214797 |
Bandpass Filter, 2.4GHz, 6 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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Band Pass | - | 2.4GHz | 802.11, WLAN | - | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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0898CP14C0035001T
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4540483 |
DIRECTIONAL COUPLER, 865-928MHZ, 0603 JOHANSON TECHNOLOGY
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Coupler | 4Pins | 865 to 928MHz | ISM Consumer Sub GHz, IoT Smart Home, Cellular, LoRa | 0603 [1608 Metric] | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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BPF2400
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4214789 |
Bandpass Filter, 2.4GHz, 50W, 50 Ohm, 802.11, WLAN, Rugged Aluminium Construction L-COM
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BPF24-406
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4214793 |
Bandpass Filter, 2.4GHz, 6 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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BPF24-411
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4214794 |
Bandpass Filter, 2.4GHz, 11 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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BPF24-814
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4214799 |
Bandpass Filter, 2.4GHz, 14 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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TPX2520LKTDRWH34L
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4453934 |
2520 0.7-2.7GHZ, N77, N79 TRIPLEXER PULSE ELECTRONICS
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TPX2012LKTFR1525L
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4453938 |
2012 1.575-2.4-5GHZ TRIPLEXER TYPETF PULSE ELECTRONICS
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BPF24-401
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4214792 |
Bandpass Filter, 2.4GHz, 1 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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BPF24-803
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4214796 |
Bandpass Filter, 2.4GHz, 3 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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BPF24-806A
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4214798 |
Bandpass Filter, 2.4GHz, 6 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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MLPF-WB-01D3
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4217889 |
RF Filter, Low Pass, 2.4 GHz to 2.5 GHz, 6 Pins, CSPG, Bluetooth 5, Zigbee STMICROELECTRONICS
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Low Pass | 6Pins | 2.4GHz to 2.5GHz | Bluetooth 5, IEEE 802.15.4, OpenThread, Optimized for STM32WB5xx, Zigbee | CSPG | - | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
BPF1005LRQYR3750A
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4453968 |
1005 N77 BPF TYPEQY PULSE ELECTRONICS
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BPF24-801A
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4214795 |
Bandpass Filter, 2.4GHz, 1 Channel, 802.11, WLAN, Rugged Aluminium Construction, N-Female Connector L-COM
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MLPF-WB-04D3
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4306538 |
Low Pass Filter, 2.4GHz to 2.5GHz, -40 to 105°C, CSPG-6 STMICROELECTRONICS
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Low Pass | 6Pins | 2.4GHz to 2.5GHz | Bluetooth 5, IEEE 802.15.4, OpenThread, Zigbee | CSPG | - |