Switch Filter Banks for Agile RF Receiver Design in Radar
This is the third installment in our RF Components for Radar series. Here, we’ll focus on a particular form of filtering technology: switch filter banks.
Designing Agile Radio Frequency (RF) Receivers with Nimble RF Components
Today, modern radar systems are expected to serve in a multi-mission capacity. For example, the F-35 Joint Strike Fighter uses a multi-function array, where the radar active electronically scanned array (AESA) in the aircraft nose cone is shared between the electronic warfare (EW) and communications systems.
Tunable bandwidth is becoming more and more desirable. Designers need to be able to balance radar range and resolution and optimize performance across missions. Further, these systems need to operate reliably in a congested spectrum where there are many blockers.
In RF communications systems, unwanted input signals, otherwise known as blockers, directly or indirectly degrade the gain and signal-to-noise ratio (SNR) of the signal of interest. Blockers take the form of intentional and unintentional interference. Other RF communications systems operating in the adjacent frequency spectrum can cause unintentional interference, but so can malicious EW systems.
Agile RF receivers can be optimized moment-to-moment to adjust to evolving parameters. This level of control is accomplished using fully digital receivers with analog filter protection to evade blockers and prevent receiver damage. Nimble analog RF components, like switch filter banks, are critical to accomplish this level of optimization.
Switch filter banks are traditionally associated with larger footprints, but KNOWLES Precision Devices is leveraging materials science innovations to shrink the size of each individual filter. We use high-precision lithographic processes to pattern microstrip filters on our custom ceramics, and we develop low-loss, temperature-stable dielectrics that allow us to significantly reduce filter form factors (Figure 1).
Figure 1: Relative DLI brand filter size with materials breakdown.
From there, our custom engineering team uses these miniature filters to create state-of-the-art multi-band filter structures that enable tiny switch filter banks.
Beyond miniaturizing filter components, there’s an opportunity to innovate around packaging. In partnership with Criteria Labs, we’ve established a small but reliable packaging concept for switch filter banks (Figure 2). With consideration for input size and how narrow the output needs to be, a designer has room for more channels.
Figure 2. Knowles Precision Devices and Criteria Labs collaborated on a design to shrink a four-channel switch filter bank.
The design, based on a four-channel filter bank, features a 3D-stacked structure with alternating filters and interposer boards mounted directly to the printed circuit board (PCB). The result is a reduction in internal spacing that ultimately reduces the size of the filter bank.
Knowles Precision Devices produces a wide variety of high-reliability components for use in leading military programs.
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本文由咪猫转载自Knowles Official Website，原文标题为:Switch Filter Banks for Agile RF Receiver Design in Radar，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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Knowles（楼氏电子）微波产品选型指南
目录- Microwave Products Microstrip Filter Overview Filter Catalog Part Number Structure Bandpass Filter Lowpass Filter Highpass Filter Cavity Filters Resonators Notch Filters Custom and Build-to-Print Integrated R-C Networks Couplers Gain Equalizers mmWave Filters Speciality Kits SatCom Offerings User Guidelines:Chip and Wire or Hybrid Assembly User Guidelines:Surface Mount Recommend Reflow for Surface Mount
型号- FPC06302,H100XHXS,PDW08607,PDW08605,PDW08606,AEQ2234,B076MB6S,L288XC3S,PDW07630,AEQ03042,PDW08604,B148LA2S,B280LB0S,B280MD1S,L220XH5S,FPC07643,B056MB5S,B028LB7S,B099NC4S,B191KA1S,B080MB5S,B061MB6S,B033ND5S,PDW07069,B168MB1S,DEB-B274MB1S,DEB-B385MDOS,B083LB6S,L204XF4S,PDR05848,B119LB1S,B065NC5S,B210LA0S,AEQ03055,J30BLBA032LX1,B20BLSBN01,N016MD9S,FHC10290,FHC10291,FHC10292,FHC10293,B012MD5S,FHC10288,FHC10289,J30BJBA002LX3,AEQ05470,AEQ02199,AEQ05471,AEQ05472,B052NC5S,C079KB1S,AEQ05467,AEQ05468,AEQ05469,PDR06120,L157XG3S,B148QF0S,H140XHXS,B350NB2S,B105MB5S,PDW06984,PDR06390,B056RC4S,C142KB0S,PDW09692,B047MC5S,B094LA2S,FPC06630,B032ND5S,B102MC1S,FPC06078,B285LB2S,FPC06077,FPC06076,PDW07948,B115NB4S,B119MB1S,B111NC4S,B230LA0S,AEQ05246,L254XF3S,PDR06380,FPC06075,FPC06074,B042OD4S,FPC06073,B060NC5S,B142LA2S,B145LB1S,B380KA1S,B274MB1S,FPC06882,FPC06881,J30BJBA032LX1,B180MA1S,PDW06407,PDW06089,PDW06400,B192NB2S,PDW06401,H120XHXS,B220LA0S,B280LA0S,B280MC1S,N012ME9S,B118LB4S,B291MB0S,B070MB6S,FHC09097,B121MB4S,FHC09096,B040RG9S,B070NC5S,B393KD0S,J30BLBA002LX3,B095MB1S,B057MC5S,B20BHSBN01,FPC07183,FPC07182,B120MB1S,FPC07181,FPC07180,FPC06149,L128XH4S,FPC07234,AEQ3042,B024RF2S,B100MC5S,AEQ2199,FPC06701,FPC06700,DEB-B259MC1S,PDW08324,PDW08323,B031ND5S,B207LA0S,H080XHXS,B116NC5S,H168XHXS,FPC06154,FPC06153,PDW06933,AEQ3055,FPC07803,FPC07802,L065XG9W,L065XG9S,B138LA2S,B138MB1S,B190MB1S,FPC06152,B055NC5S,FPC06151,FPC06150,B200LA0S,PDW06011,J30BJBA022LX2,B058MD7S,AEQ2050,FPC06164,B28BJBFN01,PDW05758,B089NC4S,FHC09101,B028RF2S,FHC09102,AEQ05510,B260MB2S,FPC06719,B150OG0S,PDW06041,B385MD0S,B062MC55,L050XF9S,AEQ02234,AEQ06042,B149MC1S,B289KA0S,PDW06398,PDW06399,PDW06038,B381KD0S,J30BLBA012LX4,B040MB5S,B112MB1S,B240LA0S,FPC09291,B259MC1S,H160XHXS,B161LA0S,B081RC0S,B250LA0S,B280MF1S,L185XF4S,B096QC2S,FPC06913,B305LA0S,L157XF3W,L060XD9S,L095XG9S,B479KB0S,L185XF4W,B120RF0S,B039NC5S,FPC07337,B160KA1S,B279KB1S,J30BLBA022LX2,H182XHXS,B144MB1S,PDW07691,B038NC4S,B424MEZS,L117XH4S,B097MB0S,L117XH4W,B050ND4S,B016MD6S,B28BHBFN01,B28BTBFN01,B127MB2S,B165LA1S,J30BJBA012LX4,H060XHXS
What Goes into a MIL-SPEC COTS EMC-Input Filter for a DC-DC Converter
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军用COTS高可靠性DC-DC|AC-DC和滤波器
型号- TBF500 SERIES,TBF500,HAE150W SERIES,RCD15W SERIES,MCF-028 SERIES,RCD30W SERIES,XTBF500,RED60W SERIES,HAE100W SERIES,RED60W,HAE150W,RCD30W,MCF-028,HAE200W SERIES,HAE100W,RCD15W,HAE200W,XTBF500 SERIES
Exxelia EMI-RFI微型滤波器选型指南
目录- LIST OF TECHNOLOGIES FILTERS FILTERS GENERAL INFORMATION,MANUFACTURE AND INSPECTION SOLDER TYPE FILTERS SCREW TYPE FILTERS SURFACE MOUNT FILTERS MULTIPLE POINT FEED THROUGH FILTERS SPACE PRODUCTS & SOLUTIONS FILTERS AND EMC PROTECTION
型号- SFCMS 35T,FL 030,SFCMS 35L,FC100 W3102IV100B,SFC 040,CFCMS 030,FP035W1041YR050B,SFC 035,FL030W5144SV050R,FC 030,FC040W3223UR025B,FC 035,FP 170,FL 060,SFP 100,AFC100W3041UR200B,FL 100,AFC 100,AFP 170,FCMS80W5432100,SFP 060 NON-HERM.,FCMS 100,FC 060,FCMS 40,AFT 100,FL060W5456UR050,FCMS 80,SFC 060 NON-HERM,FC 100,FC170W3472UV200W,FT 100,AFL 100,FP 040,SFP 035,FL 170,AFT100W7004IV050,CFCMS 35,SFC 060 HERM.,SFP 060 HERM,FCMS 030,AFL100W5005IR100B,FP040W1026UR070B,AFC 170,AFC170 W3029IV200F,FC060W3102UR100,AFP170 W1076UV400,FCMS 35,FP 035,FC 170,AFT170W7005UV450,AFL 170,FT 170,FC030W3102SV100HTR,FP030W1044SR100ΕB,FP 030,FL 040,SFP 040,FL040W5360IR050B,FC035W3101YR100,SFC 030,SFCMS 35 PI,CFCMS030W3101200,AFT 170,FC030W3102UR100,FCMS100W3681200,CFCMS35W5129100HI,FCMS60W3681200,FCM-19036E2BF100,SFP 040 XV,SFT 100,FL030W5129UR100,SFC 100,AFP060W1007UR500B,AFL170W5073IV200,FC 040,FCMS 60,SFL 100,FP 060,FCMS40W3471200,AFP100W1320IV050,SFCMS 35C
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滤波器类型SFSWG焊接安装密封EMI滤波器（3.25mm主体直径，玻璃密封法兰端）数据表
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型号- SFSWG5000471MC0,SFSWG,SFSWG1000223MX0,SFSWG5000151MC0,SFSWG1000333MX0,SFSWG5000220ZC0,SFSWG5000101MC0,SFSWG2000153MX0,SFSWG5000330ZC0,SFSWG5000680ZC0,SFSWG5000102MX0,SFSWG5000103MX0,SFSWG2000223MX0,SFSWG5000681MX0,SFSWG5000682MX0,TYPE SFSWG,SFSWG5000470ZC0,SFSWG5000221MC0,SFSWG5000332MX0,SFSWG5000222MX0,SFSWG5000100ZC0,SFSWG5000472MX0,SFSWG5000331MC0,SFSWG5000152MX0
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Smiths Interconnect announces the launch of its Planar X Series of Thin Film Bandpass Filters for critical RF filtering in X, Ku, and Ka bands
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UIYBPF6232A2T4SF 2 to 4GHz – Band Pass Filter
描述- 本资料介绍了UIY公司生产的2至4GHz频段的带通滤波器。该滤波器具有高射频性能和极具竞争力的价格，适用于军事、太空和商业应用。提供定制设计服务，并保证一年标准质保。
型号- UIYBPF6232A2T4SF
P-DUKE MCF Series Highly Integrated DC/DC Front-end Filters Accepting 9-36Vdc Input Voltage for Military and Rolling Stock Applications
P-DUKE has launched the new MCF series which are front-end filters for P-DUKE COTS (commercial-off-the-shelf) DC/DC converters to comply with the requirements of MIL-STD 1275D and MIL-STD 461. This filter series accepts 9-36Vdc input voltage (50Vdc for 1 sec.) .
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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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