一、产品特点及说明

        介质滤低通波器（也称陶瓷低通滤波器）的特点是当信号低于截止频率时，信号能正常通过；当信号高于某一频率时，信号将大幅衰减。陶瓷低通滤波器的工作原理是基陶瓷材料的特性和共振现象，通过选择合适的陶瓷材料和设计合理的谐振腔来实现对特定信号的过滤。陶瓷滤波器的作用于把杂讯滤掉，让有用的信号通过，以达到分隔不同频率电流为目的。陶瓷低通滤波器主要用于选频网络，以达到分隔不同频率电流的目的。

      陶瓷低通滤波器具有频率范围广（300MHz ~ 10GHz）、高抑制度、低插损、高功率、Q值高、幅频/相频特性好、信噪比高、热稳定性好、低温度系数、表面贴装、体积小、重量轻、焊接方便、输入/输出50Ω阻抗匹配，易于级联使用；全温范围内性能稳定可靠，满足军用工作环境要求（-55℃～+85℃）等优势。

二、产品型号及参数

介质低通滤波器（陶瓷低通滤波器）型号及参数表
型号	中心频率(MHz)	插损(dB Max)	带宽 (MHz)	波动(dBMax)	驻波(Max)	抑制(dB Min)	尺寸(mm)	规格书
DFB395R10GA	395.0	3.0	± 5.0	0.5	1.5:1	25min@10~350 MHz ; 10min@410~500 MHz ; 30min@7000~900 MHz ; 25min@1000 MHz	20.0*8.0*28.0
DFC1069LP237A	475.0	2.5	237	1.1@36MHz	2.5:1	25min@1244 MHz	5.8*2.65*6.0
DFC1192LP484A	475.0	2.5	484.0	1.1@36MHz	2.5:1	25min@1494 MHz	5.8*2.65*5.0
DFC1339LP778A	475.0	2.5	778.0	1.1@36MHz	2.5:1	25min@1785 MHz	5.8*2.65*4.25
DFC1340LP780A	475.0	3.0	780.0	1.6@36MHz	2.5:1	25min@1772 MHz; 25min@1792 MHz	5.8*2.65*4.25
DFC1396LP892A1	475.0	2.5	892.0	1.1@36MHz	2.5:1	25min@1900 MHz	5.8*2.65*4.0
DFC1400LP900A	475.0	2.5	900.0	1.1@36MHz	2.5:1	25min@1912 MHz	5.8*2.65*4.0
DFC1700LP750A	475.0	3.5	750	2.0	3.0:1	25min@1740 MHz	5.8*2.65*4.49
DFC555B30A	555.0	2.5	± 15.0	1.0	1.7:1	15min@626 MHz ; 25min@484 MHz ; 40min@335 MHz	6.0*3.0*8.6
DFC717B09A3	717.5	2.5	± 12.5	1.0	2.0:1	13min@788 MHz ; 25min@646 MHz ; 36min@497 MHz	5.8*2.8*8.7
DFC836B24A	836.0	2.5	± 12.0	1.0	2.0:1	10min@896 MHz ; 20min@776 MHz	5.8*2.8*7.9
DFB836S25DA	836.5	3.0	± 12.5	0.5	1.5:1	7.0min@DC~350 MHz ; 15min@869~894 MHz ; 50min@fo±130 MHz ; 50min@1738~1788 MHz	13.6*4.5*16.0
DFC1497HP506A	875.0	2.5	506.0	1.1@36MHz	2.5:1	30min@1187 MHz	5.8*2.65*6.4
DFM875S10ED	875.0	3.0	± 5.0	1.0	2.5:1	7min@887 MHz	13.0*5.0*12.0
DFC915D05A4	915.0	3.2	± 2.5	0.7	2.0:1	55min@452MHz;40min@806MHz;40min@849MHz; 10min@901MHz; 10min@932MHz; 33min@1900MHz;	6.0*3.0*8.7
DFC915B26A	915.0	2.5	± 13.0	0.5	2.0:1	17min@992.5 MHz ; 27min@837.5 MHz	5.8*2.8*7.0
DFN944S20HA	944.0	1.5	±10.0	1.0	1.3:1	35min@889~909 MHz	16.0*8.0*7.6
DFC1747HP506A	1000.0	2.5	506	1.1@36MHz	2.5:1	25min@1434 MHz	5.8*2.65*5.55
DFC1740HP410A	1075.0	3.5	410	2.0	3.0:1	25min@1700 MHz	5.8*2.65*4.6
DFC1968HP365A	1075.0	2.5	365.0	1.1@36MHz	2.5:1	25min@1728 MHz	5.8*2.65*4.52
DFC1971HP358A	1075.0	2.5	358.0	1.1@36MHz	2.5:1	25min@1731 MHz	5.8*2.65*4.52
DFC2025HP250A1	1075.0	2.5	250.0	1.1@36MHz	2.5:1	25min@1842 MHz	5.8*2.65*4.2
DFC2031HP238A	1075.0	2.5	238.0	1.1@36MHz	2.5:1	25min@1850 MHz	5.8*2.65*4.2
DFN1232R136EA	1232.0	0.7	±68.0	0.4	1.5:1	30min@1032 MHz; 7min@1432 MHz	9.2*4.0*8.0
DFF1235P44DA	1235.0	1.0	±22	0.3	1.5:1	25min@1559~1615 MHz	6.6*3.5*9.2
DFN1241R73EA	1241.5	0.8	±36.5	0.4	1.5:1	15min@1141.5 MHz; 10min@1341.5 MHz	9.2*4.0*8.6
DFF1268P40DB	1268.0	0.7	±20	0.3	2.0:1	15min@1518 MHz; 15min@1018 MHz	6.6*3.5*8.8
DFN1567R95EA	1567.5	0.7	±47.5	0.4	1.5:1	6min@1467.5 MHz; 40min@1167.5 MHz; 30min@1367.5 MHz; 18min@1767.5 MHz	9.2*4.0*6.7
DFF1568P17DC	1567.5	1.3	±8.5	0.5	2.0:1	6min@1616 MHz; 30min@2492 MHz	6.6*3.5*10.5
DFC1575S10A3	1575.0	1.0	± 5.0	0.5	1.5:1	5.0min@1625 MHz; 5.0min@1525 MHz	6.9*3.8*10.8
DFC1575P10A	1575.42	3.0	± 5.0	3.5	2.0:1	25min@1675 MHz; 40min@1475 MHz	5.8*2.8*5.1
DFC1575E10A1	1575.42	3.0	± 5.0	1.0	2.0:1	15min@1525 MHz; 40min@1697 MHz	6.0*3.3*5.05
DFN1587S56EA	1587.0	1.6	±28.0	1.0	1.43:1	40min@1487 MHz; 40min@1687 MHz	10.8*3.85*7.1
DFF1589P38DB	1589.0	1.0	±19	0.3	1.5:1	40min@248 MHz; 10min@1495 MHz; 25min@1395 MHz; 45min@1195 MHz	6.6*3.5*7.6
DFC2200HP1100A	1650.0	2.0	1100	1.1@36MHz	2.5:1	25min@2100 MHz	5.8*2.65*5.5
DFM1722S25EA	1722.5	2.5	±12.5	1.0	1.5:1	50min@1817 MHz	13.0*5.0*12.0
DFM1722W25FA	1722.5	4.0	±12.5	1.5	1.4:1	6min@fo±20 MHz; 40min@fo-55 MHz;45min@fo+55 MHz	22.5*6.5*10.9
DFM1747Y75GC	1747.5	6.0	±37.5	3.3	1.8:1	65min@890~960 MHz; 35min@1795 MHz;50min@1805~1880 MHz;50min@1920~2170 MHz	28.5*6.9*11.0
DFM1842Y75GC	1842.5	6.0	±37.5	3.5	1.8:1	60min@890~960 MHz; 35min@1795 MHz;50min@1710~1785 MHz;50min@1920~2170 MHz	28.0*6.9*11.0
DFM1882L65HA	1882.5	5.5	±32.5	3.5	1.3:1	25min@1922.5 MHz; 50min@1930~1990 MHz	43.5*9.5*13.0
DFC1900S40ED	1900.0	3.0	±20	1.0	1.5:1	30min@fo±60 MHz; 40min@2010~2025 MHz	10.8*3.8*5.9
DFB1952S145DA	1952.5	2.0	± 72.5	0.5	2.0:1	30min@2400 MHz ; 30min@4000 MHz	13.0*4.5*13.0
DFM1962L65HA	1962.5	5.5	± 32.5	0.5	1.2:1	25min@1922.5 MHz ; 60min@1830~1910 MHz	43.5*9.5*13.0
DFM2017T15EA	2017.0	3.0	±7.5	1.0	1.3:1	50min@1920 MHz;30min@1980 MHz;50min@2110~2170 MHz;50min@2320~2370 MHz	14.0*5.5*10.0
DFM2017S15EE	2017.5	3.0	±7.5	1.0	1.5:1	45min@fo-100 MHz;45min@fo+100 MHz	13.0*5.0*12.0
DFM2140Y60GA	2140.0	6.0	±30.0	3.5	1.7:1	8min@fo±32.7 MHz;10min@fo+33.5 MHz; 30min@fo+42.5 MHz	28.0*6.9*11.0
DFM2140S60EB	2140.0	3.0	±30.0	1.0	1.5:1	45min@fo-100 MHz;45min@fo+100 MHz	13.0*5.0*13.0
DFC2326H12A1	2326.25	2.5	± 6.25	1.2	2.0:1	18min@2227 MHz; 10.5min@2341.25 MHz	7.3*3.06*7.1
DFM2335Y70HA	2335.0	2.5	±35.0	1.0	1.5:1	20min@1990~2280 MHz; 35min@2400~2485 MHz	33.4*9.0*12.0
DFM2345S50EC	2345.0	2.0	±25.0	1.0	1.5:1	40min@1920~2170 MHz; 40min@2555~2655 MHz	13.5*5.0*12.0
DFM2345S50GI	2345.0	1.5	±25.0	0.8	1.3:1	15min@24100 MHz; 10min@f2300 MHz;  35min@900 MHz	15.5*7.5*10.0
DFM2345W50FA	2345.5	3.0	±25.0	1.0	1.4:1	45min@fo+100 MHz;45min@fo+100 MHz; 55min@fo-140 MHz	22.5*6.5*10.9
DFN2350W100EA	2350.0	2.0	±50.0	1.0	1.4:1	20min@3437 MHz; 40min@2450~2500 MHz	15.9*4.3*7.4
DFC2332H25A2	2332.5	2.5	± 12.5	1.0	2.0:1	35min@2106 MHz; 35min@2571 MHz	7.2*3.2*7.0
DFC2338P13A2	2338.75	2.5	± 6.5	1.0	1.5:1	24min@2108 MHz; 24min@2568 MHz	7.3*3.65*7.1
DFC2442V84A1	2442	2.0	± 42	1.0	2.0:1	25min@2150 MHz	3.0*1.7*3.4
DFM2491X10FA	2491.75	2.5	±5.0	1.0	/	40min@1611~1621 MHz; 65min@2396.25 MHz	13.0*6.0*12.0
DFM2492R10GB	2492.0	1.2	±5.0	0.3	1.5:1	8min@fo±100 MHz; 20min@fo±200 MHz	16.0*7.2*10.2
DFM2605W60FA	2605.0	2.8	±30.0	1.0	1.4:1	50min@885~909 MHz; 50min@930~954 MHz	22.5*6.5*9.0
DFD2620S50EA	2620.0	2.2	±25.0	1.0	1.4:1	50min@fo±55 MHz;40min@fo±120 MHz;38min@fo±138.24 MHz	10.8*3.8*5.7
DFC3450H300A2	3450.0	2.0	±150	1.0	1.7:1	35min@660~720 MHz; 35min@1320~1440 MHz;40min@1980~2160 MHz; 5min@2970~3240 MHz;25min@3960~4320 MHz; 20min@4620~5040 MHz; 25min@5280~5760 MHz; 17min@7260~7920 MHz;  15min@8580~9360 MHz	7.4*3.0*4.4
DFC3470S40EA	3470	2.0	±50	1.0	1.5:1	15min@3300~3370 MHz; 15min@3570~3700 MHz	10.8*3.85*5.9
DFN3500W200EA	3500.0	2.5	200	1.0	1.9:1	25min@3320 MHz; 25min@3680 MHz	15.9*4.5*7.3
DFN3700W200EA	3700.0	2.0	200	1.0	1.9:1	25min@3520 MHz; 25min@3880 MHz	16.4*4.5*6.2
DFC5235S180DFA	5235.0	2.5	±90.0	1.0	1.9:1	50min@5490~58500 MHz	8.6*2.9*3.5
DFC5240G200A	5240.0	1.5	±100.0	1.0	1.9:1	30min@2400~2700 MHz; 21min@5480~5860 MHz	3.*1.85*2.8
DFC5240180DA	5240.0	2.0	±90	1.0	1.9:1	40min@5490~5850 MHz	8.6*3.0*4.0
DFC5245G190A	5245.0	3.0	±95	1.2	1.9:1	30min@2400~2500 MHz; 25min@5480~5550 MHz;30min@5550~5900 MHz	3.6*1.85*2.8
DFC5250S160DC	5250.0	2.3	±80	1.2	1.67:1	40min@5490~5835 MHz	8.2*3.0*4.0
DFN5250S160DA	5250.0	3.0	±80.0	1.2	1.67:1	50min@5490~5835 MHz	8.2*3.3*5.3
DFN5662S345DA	5662.5	3.0	345	1.5	1.67:1	50min@5170~5330 MHz	8.2*3.3*5.3
DFC5662S345DC	5662.5	2.3	345	1.0	1.67:1	40min@5170~5330 MHz	8.2*3.0*4.0
DFC5665G370A	5665.0	3.0	±185	1.0	1.9:1	30min@2400~2500 MHz; 25min@5150~5340 MHz	3.6*1.85*2.68
DFC5670G380A	5670.0	1.5	±190	1.0	1.9:1	25min@2400~2700 MHz; 21min@5140~5340 MHz	3.6*1.85*2.68
DFC5670S360DA	5670.0	2.0	±180	1.0	1.9:1	40min@5150~5330 MHz	8.6*3.0*3.8
DFC5697S360DF	5670.0	2.5	±180	1.3	1.0	50min@5150~5330 MHz	8.6*2.9*3.45
注：因产品型号较多，表中只列出部分代表性型号，定购前需详细沟通，再了解其它指标

三、注意事项及用途

       陶瓷低通滤波器广泛应用于基站、T/R组件、射频微波、Wi-Fi、直放站、移动通信领域及消费类电子产品。在使用时，注意接地端接地良好，否则会影响带外抑制及平坦度指标。焊接时温度使用推荐温度，不能过高，时间也不能过长。若采用回流焊焊接，建议使用推荐温度，不宜用波峰焊接。产品应贮存在环境温度为-10℃~40℃、相对湿度不大于80%、周围环境无酸性、碱性以及其它无有害气体的库房中。清洗时要禁止浸泡，建议用酒精擦试。 

      本公司有多种尺寸的陶瓷低通滤波器（介质低通滤波器）供用户选择，可定制 从300MHz 至 10GHz的陶瓷低通滤波器，陶瓷高通滤波器，陶瓷带通滤波器，陶瓷带阻滤波器。设计灵活。因为微波元器件的各指标之间相互牵连，相互景响，所以用户在定制前需明确说明指标要求。产品已经制成，则无法更改。如有指标要求超过材料本身物理极限，可通f过双方协商来达到最佳指标。