What You Need to Know About RF Filter?

2023-06-01 UIY News

The RF filter is one of the essential key components in the radio frequency system. It is mainly used for frequency selection—letting the required frequency signal pass and reflecting the unwanted interference frequency signal.


A classic example of a filter application is a receiver or transmitter front end, as shown in Figure 1

Figure 1: Receiver RF Front-End



As can be seen from Figure 1, the filter is widely used in the RF band, IF band, and Baseband of the receiver. Although digital technology develops rapidly, the digital filter has replaced the analog filter at the baseband part and even the IF band section, but the filter of the RF part is still irreplaceable. Therefore, the filter is one of the essential key components in the radio frequency system.


Figure 2: Super-heterodyne receiver



Figure 3:The Composition of a GPS receiver


RF Filter Types

By frequency: low-pass filtershigh-pass filtersband-passband-stop filters, etc.;

By structure: LC filter, Surface Acoustic Wave Filter/Body Acoustic Wave Filter, Spiral Filter, Helical Filter, Dielectric FilterCavity filter, High-Temperature Superconducting Filter, and Planar Structure Filter.

 

By frequency response functions, it can be divided into: Chebyshev, Generalized Chebyshev, Butterworth, Gaussian, Bessel function, Elliptic function, etc.

 

How to Choose an RF Filter?

When selecting a filter, the first thing to determine is whether to use a low-pass, high-pass, band-pass, or band-stop filter. The following is to introduce the types by frequency response characteristics and functions, such as high-pass, low-pass, band-pass and band-stop classified.


Butterworth VS Chebyshev Low Pass Filter


 


Butterworth VS Chebyshev Band Pass Filter



Butterworth VS Chebyshev Band Stop Filter


Low pass and band pass filters are the most commonly used filters.

Low-pass Filter is widely used in the image suppression of the mixer part and the harmonic suppression of the frequency source part.


Band-pass Filter is widely used in the receiver front-end for signal selection or after the transmitter power amplifier for spurious suppression, or at frequency source section for spurious suppression, etc.

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UIYBPF8844A,UIYBCC6466A,UIY4PD12071A,UIYDI4249A,UIYDX9580B,UIYDX9580A,UIYHPF3426A,UIYCDI9678A,UIYBCC5049A,UIYDX6733A,UIYBCC5049B,UIYWI2836A,UIYCC4550A,UIYCI1522A,UIYBSF29567A,UIYDDI12075A,UIYCDI7038A,UIYBDI5049B,UIYCA500A,UIYWI4242A,UIYBPF12021A,UIYBPF8648A,UIYBPF10060A,UIYDC3538A,UIYWI1636A,UIYBDI5049A,UIYTX120120A,UIYCA100AN18,UIYWTCWR90A,UIYBCI3434G,UIYBCI3434F,UIYWTCWR90E,UIYCT150AN3,UIYCA50AS18,UIYCT150AN6,UIYDI1925A,UIYCA300AN124,UIYDX12276A,UIYBSF202152A,UIY6RS1UB,UIYWC1027A,UIYLPF19048A,UIYDX170125A,UIY8PD199106A,UIYBCI3434D,UIYBCI3434C,UIYWI1940A,UIYBCI3434B,UIYBCI3434A,UIYMI1416A,UIYWC2225A,UIYDI5663A,UIYWC2225B,UIYBPF250166A,UIYBDC5972A,UIYMC55B,UIY8PD10875A,UIYCT5AN124,UIYHPF3733A,UIY4PD5650A,UIY4PD5650B,UIYLPF15830A,UIYLPF3325A,UIYDDC16080A4P,UIYDX62112A,UIYWTCWR112A,UIY8PD245174A,UIYBPF205205A,UIYWTCWR112E,UIYSI15A,UIYBPF7070A,UIYWC4444A,UIYCA300AN3,UIYBDC6434A4P,UIYCA300AN6,UIYCA300AN8,UIYHPF3734A,UIYBPF5313A,UIYBPF9033A,UIYBCC2618A,UIYCT50AN6,UIYBCC2618B,UIYCA2AS18,UIYCT50AS18,UIY8PD144103B,UIY8PD144103A,UIYWTCWR159A,UIYCT50AN3,UIYBPF6535A,UIYWTCWR159E,UIYDX121159A,UIYCA200AN8,UIYCT5AN3,UIYCT5AN18,UIYDI2020A,UIYDX260190A,UIYDDC12060A4P,UIYCA200AN6,UIYCA200AN3,UIYBDC10149A,UIYCT5AN6,UIYCT25AS8,UIYBDC10149B,UIY2T1HC422165A,UIYCI5356A,UIYCA25AS18,UIYMC33Y,UIYBPF338151A,UIYCC5356A,UIYDMC108B,UIYDMC108A,UIYBCI10149B,UIYLPF9426A,UIYBDI6466A,UIYBCC1920A,UIYBCI10149A,UIYBCC1920B,UIYDX340210A,UIYLPF4630A,UIYCA2AS124,UIYCDC7038A4P,UIY4T8RTR3UB2C,UIYBDI5028A,UIYBPF100104A,UIYSC7A,UIYDDI7046A,UIYDI5356A,UIYBCC5028A,UIYDX185155A,UIYSI12A,UIYCDC16080A,UIYWTCWR137A,UIYBDC7272A,UIYWTCWR137E,UIYSI36A,UIYDMC109A,UIYDMC109B,UIYWTCWR28E,UIYCT100AN18,UIYBCC4550A,UIYBPF4814A,UIYCT25AS18,UIYCA150AN3,UIYCDI12060A,UIYDDC3819A,UIYBCI4040B,UIYBCI4040A,UIYBPF12028A,UIYCA10AS3,UIYBPF11022A,UIYBPF4814B,UIYDC815A,UIYDDCP21424A,UIYDI4242A,UIYBPF12026A,UIYSC9B,UIYBPF4815B,UIYLPF3322A,UIYBSF12069A,UIYWI4444A,UIYSI10A,UIYLPF4520A,UIYWI2025A,UIYBDC1920A,UIYWI2025B,UIYMC77A,UIYBSF16168A,UIYBDC1920B,UIYBDI1326A,UIYBDI1326B,UIYHPF5033A,UIYBPF10068A,UIYCA2AS3,UIYCA2AS6,UIYBDC4222A,UIYCA2AS8,UIYBSF4012A,UIYCA10AS8,UIY6TC1UA,UIYCDC12060A4P,UIY6TC1UB,UIY2PD2828E,UIYBCC4222A,UIY2PD2828F,UIYCA10AS6,UIY2PD2828G,UIYWC3842A,UIY2PD2828A,UIY16PD22393A,UIY2PD2828B,UIYBPF10069A,UIY2PD2828C,UIY2PD2828D,UIYDDCP10025A,UIYCT25AN3,UIYBCI1326A,UIYCA150AN6,UIYBCI1326B,UIYCA5AS18,UIYCT25AN6,UIYBCI5049B,UIYBCI5049A,UIYCT25AN8,UIYWI1925A,UIYBSF11968A,UIYBPF9090A,UIYBPF6464A,UIYLPF8863A,UIYCC4337A,UIYHPF2822A,UIY4PD5230A,UIYBPF17384A,UIY2PD158122A,UIYBPF100145A,UIY4PD136119A,UIYDC1220A,UIYCT500AN18,UIYBPF5026A,UIYBSF17235A,UIYDDC3819A4P,UIY4PD8562A,UIYDX9976A,UIYWI2262A,UIYCT200AN3,UIYCT1000A,UIYCT200AN8,UIYCT200AN6,UIY2T1HC14244A,UIYWTCWR284E,UIYWTCWR284F,UIYCC120140A,UIYBPF5353A,UIYMI1212A,UIYDCP5525A,UIYBCC14272A4P,UIYCA10AS124,UIYDI1219A,UIYBDI2528B,UIYDX8862A,UIYBDI2528A,UIYDDC5025A,UIYDX140110A,UIYWTCWR284A,UIYBDI4040A,UIYWI2260A,UIYLPF16525A,UIYCT10AN124,UIYCA5AN124,UIYBDI4040B,UIYBCI2528A,UIYBDI2525C,UIYBDI2525B,UIYBDI2525A,UIYBCI2528B,UIY2T1HC16445A,UIYWTCWR1150A,UIYDDC1716A4P,UIYCI2528A,UIYBPF3020B,UIYCI100166A,UIYCDC6834A4P,UIYLPF4125A,UIYBSF11060A,UIYCDC6432A,UIYCA2AN6,UIYCA2AN8,UIYBCC2618B4P,UIYBPF12553A,UIYCA2AN3,UIYHPF3934A,UIYDX18484A,UIYBPF4025A,UIYCA30AS3,UIYDX14073A,UIYCA30AS5,UIYDX11880A,UIY2PD2835A,UIYCI4337A,UIYBDI1025A,UIYLPF3022A,UIYCT80AN6,UIYMI45B,UIYCT80AN3,UIY4PD5060A,UIYBDI6075F,UIYBPF3414B,UIYBPF3414A,UIYWI2238A,UIYCT2000A,UIYBPF11890A,UIYBPF4721A,UIY2T2RTR350158A,UIYDI80140B,UIY3PD122158A,UIYMI44B,UIYMI44A,UIYBPF7022A,UIYBPF7373B,UIYMI44C,UIYBPF7373A,UIYTX11676A,UIYBCI2618B,UIYWI4876A,UIYBDC2528A,UIYBDC2528B,UIYCT2AB3,UIYBPF10016A,UIYBCI2618A,UIYMI45A,UIYBPF15065A,UIYBDC1716B4P,UIYBPF8550A,UIYCT2AB6,UIYCDC9648A4P,UIYTX7164A,UIYDC2020A,UIYTX7164B,UIYCT500AN124,UIYWTCWR34A,UIY3T1HC30480B,UIY3T1HC30480A,UIYWTCWR10A,UIY4TC420420B,UIYWTCWR34E,UIYWTCWR10E,UIYMC1414A,UIY4TC420420A,UIYDC100100A,UIYBCC3434F,UIYBCC3434C,UIYBCC3434D,UIYBCC3434A,UIYBCC3434B,UIYBPF6817A,UIYCA100AN8,UIYCA100AN6,UIYBDC1325B,UIYBCC3434G,UIYCA50AS124,UIYDI3538A,UIYBDC1325A,UIYCA100AN3,UIYBCI4222A,UIYBSF12070A,UIYCC2525A,UIYBCC6060G,UIYCA25AS124,UIYBCC6060H,UIYBCC6060E,UIYBCC6060F,UIYLPF9923A,UIYBCC6060C,UIYBCC6060D,UIYBCC6060A,UIYBCC6060B,UIYWC3030A,UIYTX100140A,UIYWC3030B,UIYHPF3818A,UIYWI2128A,UIYLPF6420A,UIYLPF17227A,UIYBPF6020A,UIYCA10AN3,UIYCA10AN6,UIYBPF5815A,UIYWTCWR12A,UIYWTCWR12E,UIYCA10AN8,UIY2T2HC23040A,UIYCI6075A,UIYDX166125A,UIY2PD48157A,UIYDX482192A,UIYDDI4027A,UIYBPF6023A,UIYDX118118A,UIYBPF10673E,UIYBPF10673G,UIYBPF10673F,UIYDX102200A,UIYCI4550A,UIYDDI3819A,UIYBPF10673C,UIYBPF10673B,UIYWI2259A,UIYBDC5049B,UIYCDC7038A,UIYBDC5049A,UIYBSF3525A,UIYDX320420A,UIY8TC1UB,UIY2PD3728A,UIY8TC1UA,UIYBCI6466A,UIYBPF8663A,UIY2T2HC40030A,UIYBPF5817A,UIYBSF12970A,UIY2PD2619A,UIY4PD220162A,UIYBCI5028A,UIYDCP8220A,UIYBDC5028A,UIYSC15A,UIYBDC5028B,UIY4TC330330A,UIYCA500AN124,UIYDC4242A,UIYWTCWR15A,UIYBDC6466A,UIYHPF3025A,UIYHPF3025B,UIYWTCWR15E,UIYWTCWR15F,UI

选型指南  -  优译  - 25th Oct, 2024 PDF 英文 下载

Rosenberger(罗森伯格)分布式天线系统(DAS)选型指南

目录- Rosenberger company profile    Passive DAS Systems Components    Passive DAS Systems Components Selection table   

型号- 64K1C7-C09B1,SL 014 S PE,SL 158 R L FRNC,60K101-KIMN1,60Z150-012,SLZ0009-000,SL21OUCBE3M,SL 078 R L FRNC,DC-6-11F-64F-T,8FW-90-8-64K-11F-OD,64S1C7-CX5N1,S-2-11F-64F-T,IM-B-FI-800/B20-G,SL21OUCBE3S,IM-B-FI-2600/B7,DC-10-11F-64F-T,SL 014 R FRNC,SLZ0002-1001,64S2C7-C08N1,SLZ0002-000,64S1D7-C06N1,9WMB-41,S-WAVE 0640FW-10/12-LP-64K,HM-6-11F-64F-T,S-3-11F-64F-T,SL 012 R FRNC,L-100-64F-T3,IM-CABLE-716M-4310M-XXX,53S189-S00N1,IM-B-FI-1400/B11+21,64K189-K00N1,53S189-K00N1,SLPUFCE3F,60W000-002,64S1C7-C09N1,SL 012 S PE,64K1D7-C06B1,IM-A-BU-PU-EF,SL 114 R L FRNC,64S189-K00N1,SL 114 R L PE,64K1C7-C08B1,5WMB-41,SL 078 R L PE,99W057-001,53S160-SIMN1,99W057-000,DC-30-11F-64F-T,IM-B-FI-700/B28,60S101-SIMN1,IM-A-BU-BAT,64K501-K00B1,L-200-64F-T3,60W107-C09,60W107-C08,60W107-C01,60W107-CXX,IM-B-BU-0727,SLTK003-002,A-XX-100-64-T3,DC-8-11F-64F-T,SL 038 S PE,64K101-K00B1,64S1C7-C02N1,S-WAVE 0627/0627-33-14D-11,IM-A-BAT-CHARGER,IM-B-FI-900/B8+,DC-15-11F-64F-T,53K102-K00N5,SL 158 R L PE,IM-B-FI-800/B20,60Z150-020,SL 014 S FRNC,A-XX-50-64-T3,SL 014 R PE,DC-12-11F-64F-T,60W007-C03,SL21DFFAENS-2,53K189-K00N1,60W007-C05,64S2C7-C03N1,53S164-K00N1,64K1C7-C03B1,64K1D7-C07B1,IM-B-ACSRY-BAG,IM-CABLE-4310M-4310M-XXX,SL 038 S FRNC,L-10-64F-T3,64S101-K00B1,60W110-C06,53K160-KIMN1,60W110-C07,SLT004-000,8FW/8FW-65-8D-64K-11F,IM-B-FI-1800/B3,G2W33D-21,60S164-K00N1,64S1C7-C03N1,53K164-S00N1,60S101-KIMN1,65S153-KIMN1,8FW-90-8-64K-11F,IM-B-FI-2100/B1-G,IM-A-ACSRY-BACKPACK,64K189-S00N1,SLOMNI280-00-64F,64S101-S00N1,HM-3-11F-64F-T,SL21DEFAENS-2,64S2C7-C02N1,DC-20-11F-64F-T,64K1C7-C02B1,S-4-11F-64F-T,A-XX-100-11F-64-T3,53W010-000,8FW/8FW-OD-6-64K-B6-11F,64K1C7-CX5B1,53S201-K00N5,60S231-K00N1,64S201-K00B1,IM-B-FI-1800/B3-G,60S153-KIMN1,IM-B-FI-900/B8+-G,8FW-OD-3-64K-11F,IM-B-FI-700/B28-G,SL 012 R PE,64S1D7-C07N1,IM-B-FI-1400/B11+21-G,64S2C7-C09N1,53K189-S00N1,8FW/8FW-65-8D-64K-11F-OD,IM-B-FI-2100/B1,60S164-S00N1,64W022-001,A-XX-50-11F-64-T3,64S189-S00N1,53S160-KIMN1,IM-CABLE-716M-716M-XXX,64S189-KD0N1,53S101-S00N5,SL 012 S FRNC,IM-B-FI-2600/B7-G,L-2-64M-01,53S164-S00N1,IM-LOAD-SITE 4.3-10,L-50-64F-T3,64S1C7-C08N1

选型指南  -  ROSENBERGER  - December 2020 PDF 英文 下载

优译(UIY)公司及产品介绍

描述- 优译(UIY)公司介绍&产品介绍

型号- UIYWI4876A9T10,UIYBCI7272A,UIYBCI6434A,UIYBCI1319A,UIYBCI6236A,UIYDI100166A,UIYDI1212B,UIYDI1220A,UIYCI6075A,UIYCI3232A,UIYDI1919A,UIYDI8080A,UIYBDI5377A,UIYCI2538A,WR15,UIYBDI5377B,UIYBCI4040A,UIYCT1000A,UIYBCI2122A,UIYDI1919B,UIYCI3434A,UIYBCI0149A,UIYDI15663A,UIYCI1522A,UIYCI1624A,UIYCI3538A,BJ400,UIYDI6075A,UIYDI4557A,BJ320,UIYCI4550A,UIYDI2525A,WR42,UIYCDI7048A860T872NF,UIYDI15656A,UIYCI1220A,UIYBCI6236B,UIYBCI6466A,UIYWTCWR22A,UIYDI2020A,UIYWTCWR34A,UIYWTCWR42A,UIYDI4550A,UIYDI1024A,WR28,UIYMI1416A37T4,UIYDI815A,UIYBCI3232C,UIYBCI2528A,UIYBCI5028A,UIYBCI3434G,UIYBCI3232D,UIYDI3546A806T825SF,UIYBCI3232B,UIYCI6060A,UIYCI5356A,WR34,UIYCI2528A,UIYDI1925A,UIYCI100166A,UIYWTCWR19A,UIYDI3546A,UIYCI5663A,UIYDI3538A,UIYWTCWR15A,BJ260,UIYBCI4222A,UIYWTCWR15B,BJ620,BJ500,UIYCI4580A,WR19,UIYDI2027A,UIYCI8080A,BJ220,UIYBCI3434C,UIYBCI1621A,UIYSI25A490T510,UIYBCI5049B,UIYCI5656A,WR22,UIYBCI5049A,UIYDI5356A,UIYDI6060A,UIYDI2531A,UIYDI3232A,UIYCI3556A,UIYCI5377A,UIYBCI14272A,UIYCI5377B,UIYWTCWR28A,UIYCI1024A

商品及供应商介绍  -  优译 PDF 中文 下载

商品及供应商介绍  -  SMITHS INTERCONNECT  - Version 3.2  - 2024/4/9 PDF 英文 下载

Introduction to Common Frequency Band of Satellite Communication (C / Ku / KA Band)

UIY Inc. specializes in RF and microwave passive components, integrating R &D, production, sales and service. In this paper,UIY will introduce Common frequency band of satellite communication (C / Ku / KA band).

原厂动态    发布时间 : 2022-01-07

UIY INC. Exhibits at 2024 IMS Washington D.C. 18th~21th June

Booth # 21532024 IMS international microwave symposiumDate 18-20th June 2024 , At Washintong DC Alter E. Washinton Convertion Center

原厂动态    发布时间 : 2024-06-21

应用及方案  -  SMITHS INTERCONNECT  - Version 3.0  - 2021/10/14 PDF 英文 下载

Switch Filter Banks for Agile RF Receiver Design in Radar

This is the third installment in our RF Components for Radar series. In the first installment, we provided an overview of the key functional units in radar, including duplexing, filtering, power amplification, waveform generation, low-noise amplification (LNA), receiving and analog-to-digital conversion (ADC). Here, we’ll focus on a particular form of filtering technology: switch filter banks.

设计经验    发布时间 : 2024-06-14

商品及供应商介绍  -  SMITHS INTERCONNECT  - Version 2.0  - 2020/01/19 PDF 英文 下载

The Allocation of 1250mhz Frequency Band

1250MHz is one of the popular bands in frequency allocation, benefiting from its capability of long signal transmission, low attenuation compared to the mmWave band, etc. In this article, UIY will introduce the allocation of the 1250mhz frequency band.

技术探讨    发布时间 : 2024-03-06

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射频无源器件定制

可定制射频隔离器/环行器(10M-40GHz),双工器/三工器(30MHz/850MHz-20GHz),滤波器(DC-20GHz),功分器,同轴负载,同轴衰减器等射频器件;可定制频率覆盖DC~110GHz,功率最高20KW。

最小起订量: 1 提交需求>

ESD防护解决方案

整体外形尺寸小至0.6*0.3*0.3mm (DFN0603),工作电压范围覆盖2.5V~36V,电容值低至0.2pF,浪涌能力最高可达240安培,静电等级可达空气放电、接触放电±30KV。提供免费浪涌测试仪、静电测试仪测试。

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