一、Characteristics

LTCC low-pass filter (ceramic low-pass filter) has the function of suppressing high-order harmonics, image information, transmission leakage signal, and all kinds of parasitic clutter interference, so as to separate different frequency currents, improve reception quality, and inhibit other frequency signals, so as to realize the filtering of amplitude-frequency and phase-frequency characteristics with specific accuracy. The characteristic of LTCC low-pass filter is that when the signal is lower than the cutoff frequency, the signal can pass normally; When the signal is above a certain frequency, the signal will be greatly attenuated, or the signal from zero to a certain cutoff frequency will be allowed to pass without attenuation.

       LTCC low-pass filter (ceramic low-pass filter) has the characteristics of good high-frequency characteristics, small size, low power consumption, low phase noise, circuit miniaturization, high device integration, high-speed transmission and wide passband, which can improve the quality factor of the circuit and increase the flexibility of the circuit design. Can adapt to high current, high temperature resistance, long life; High integration, light weight, small size, good compatibility; The product has high through-rate, good product consistency, convenient installation, cheap price, high component integration, stable and reliable performance in the full temperature range, and meets the requirements of military working environment (-55℃ ~ +85℃).

LTCC low-pass filter

二、Electrical Characteristics

LTCC low-pass filter (ceramic low-pass filter) model and parameter table
Part No	Frequency (MHz)	Insertion loss（dB）	V.S.W.R	Size（mm）	SPEC
LF31L1300H126-L38	DC--1000	≤ 1.0	≤ 2.0	3.2 * 1.6 * 1.0
LF43L0865H82-L24	5--865	≤ 3.3	≤ 2.0	4.5 * 3.2 * 2.0
LF43L0500H93-L26	100--900	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.6
LF43L0500H72-L32	100--900	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.6
LF43L0437H93-L43	174--700	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.6
LF18L0960H105-L136	663--960	≤ 0.8 / ≤ 0.9	≥ 10 dB	1.6 * 0.8 * 0.6
LF18L2490H87-L54	673--2690	≤ 0.5	≤ 2.0	1.6 * 0.8 * 0.6
LF18L0960H98-L135	698--960	≤ 0.35	≥ 16 dB	1.6 * 0.8 * 0.6
LF15L0960H1311-L78/K	698--960	≤ 0.9	≥ 10 dB	1.6 * 0.8 * 0.6
LF18L0960H105-L71	698--960	≤ 0.8	≥ 10 dB	1.6 * 0.8 * 0.6
LF18L0960H98-L135	698--960	≤ 0.35	≥ 16 dB	1.6 * 0.8 * 0.6
LF18L0960H119-L75/R	699--960	≤ 0.9	≥ 9.5 dB	1.6 * 0.8 * 0.6
LF18L0960H105-L70/K	699--960	≤ 0.6 / ≤ 0.7	≥ 10 dB	1.6 * 0.8 * 0.6
LF18L0960H105-L70	699--960	≤ 0.6 / ≤ 0.7	≥ 10 dB	1.6 * 0.8 * 0.6
LF18L2690H86-L133	699--2690	≤ 0.18	≥ 15 dB	1.6 * 0.8 * 0.6
LF21L2025H1008-L140	800--2025	≤ 0.5 / ≤ 0.8 / ≤ 1.5	≤ 2.0	2.0 * 1.25 *0.9
LF43B0900P57-N108	850--950	≤ 4.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L0977H72-L20	950--1003	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1025H93-L37	950--1100	≤ 2.2	≤ 2.0	4.5 * 3.2 * 1.6
LF43B1035P47-N65	950--1120	≤ 2.2	≤ 2.0	4.5 * 3.2 * 2.0
LF43B1071H93-N100	950--1193	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
LF34B1071P46-N94	945--1196	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.5
LF34B1086P46-N84	950--1222	≤ 2.0	≤ 2.0	4.5 * 3.2 * 1.
LF43B1200H2111-N51	950--1450	≤ 2.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L069H072-L39	950--1188	≤ 3.5	≤ 2.0	4.5 * 3.2 * 2.0
LF43L069H072-L40	950--1188	≤ 2.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1071H072-L22	950--1193	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1128H72-L29	950--1253	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1115H072-L21	950--1280	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1150H72-L28	950--1350	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1190H72-L42	950--1430	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1190H72-L51	950--1430	≤ 3.5	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1190H72-L58	950--1430	≤ 3.5	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1200H45-L04	950--1450	≤ 2.0	≤ 2.0	3.2 * 2.5 * 1.5
LF43L1192H72-L25/B	950--1450	≤ 3.5	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1192H72-L23	950--1434	≤ 3.5	≤ 2.0	4.5 * 3.2 * 2.0
LF32L1222H45-L41	950--1493	≤ 0.9	≤ 2.0	3.2 * 2.5 *1.5
LF43L1325H178-L114	950--1700	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF32L1325H45-L16	950--1700	≤ 3.5	≤ 2.0	3.2 * 2.5 *1.5
LF43L1325H72-L27	950--1700	≤ 2.8	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1325H72-L33	950--1700	≤ 2.8	≤ 2.0	4.5 * 3.2 * 2.0
LF43L1325H45-L34	950--1728	≤ 2.8	≤ 2.0	4.5 * 3.2 * 1.5
LF43L1365H45-L19	950--1780	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF52B1550H1710-N105	950--2150	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L090H072-L11	1000--1180	≤ 2.0	≤ 2.0	4.5 * 3.2 * 2.0
LF43L2090H166-L55	1000--2900	≤ 4.0	≤ 2.3	4.5 * 3.2 * 1.5
LF34B1102P46-N13	1070--1133	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.5
LF43B1315H92-N46	1160--1470	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.6
LF23B1210P58-N80	1180--1240	≤ 2.7	≤ 2.0	3.2 * 2.5 * 1.2
LF15L2025H1109-L123/K	1180--2025	≤ 1.4	≤ 2.0	1.0 * 0.5 * 0.38
LF43B1406P67-N14	1198--1614	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
LF43B1315P56-N66	1230--1400	≤ 2.0	≤ 2.0	4.5 * 3.2 * 2.2
LF43B1411P57-N101	1293--1529	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
LF43B1411P67-N92	1293--1529	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
LF34B1416P45-N95	1297--1536	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.5
LF43B1460P57-N106	1325--1595	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.5
LF43H1741P57-H35	1333.5--2150	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
LF34B1460P46-N85	1335--1585	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.5
LF43H1535H091-H03	1335--1735	≤ 2.5	≤ 2.0	4.5 * 3.2 * 1.5
LF43B1555H091-N132	1355--1755	≤ 2.0	≤ 2.0	4.5 * 3.2 * 1.5
LF43B1569P67-N62	1367--1770	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
LF43B1612P57-N11	1494--1731	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.6
LF23H1825P57-H24	1500--2150	≤ 2.0	≤ 2.0	2.5 * 3.2 * 1.5
LF34H1830P57-H36	1510--2150	≤ 3.0	≤ 2.0	3.2 * 4.5 * 2.0
LF34H1830P57-H41	1510--2150	≤ 3.5	≤ 2.0	3.2 * 4.5 * 2.0
LF34H1830P57-H43	1510--2150	≤ 3.5	≤ 2.0	3.2 * 4.5 * 2.0
LF43B1645P56-N67	1520--1770	≤ 2.0	≤ 2.0	4.5 * 3.2 * 2.2
LF43B1643P57-N103	1524--1762	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.5
LF34H1850P57-H45	1525--2160	≤ 3.5	≤ 2.0	3.2 * 4.5 * 2.0
LF34H1862P57-H34	1573.5--2150	≤ 3.5	≤ 2.0	3.2 * 4.5 * 2.0
LF23H1900P57-H05	1600--2100	≤ 1.8	≤ 2.0	2.5 * 3.2 * 1.5
LF43B1769P57-N102	1629--1910	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
LF43H1890P56-H17	1629--2150	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.6
LF43B18554P56-N45	1630-2080	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
‍LF43B1739P57-N96/21	1635--1842	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.5
LF23B1680P56-N82	1645--1715	≤ 2.5	≤ 2.0	2.5 * 3.2 * 1.2
LF43H1900P56-H01	1650--2150	≤ 2.0	≤ 2.0	4.5 * 3.2 * 2.1
LF23H1900P56-H02	1650--2150	≤ 2.0	≤ 2.0	2.5 * 3.2 * 1.5
LF43H1916P68-H19	1681--2150	≤ 3.0	≤ 2.0	4.5 * 3.2 * 2.0
‍LF43B1784P57-N107	1691--1877	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.5
‍LF15L2180H1009-L137	1695--2180	≤ 0.6	≤ 2.0	1.0 * 0.5 * 0.38
LF34B1785P46-N86	1700--1870	≤ 4.0	≤ 2.0	3.2 * 4.5 * 1.5
LF18L2690H98-L134	1710--2690	≤ 0.35 / ≤ 0.50	≥ 15 dB	1.6 * 0.8 * 0.6
LF18L1990H104-L68/R	1710--1990	≤ 0.6	≥ 10 dB	1.6 * 0.8 * 0.6
LF23H1960P57-H10	1770--2150	≤ 3.0	≤ 2.0	2.5 * 3.2 * 1.5
LF43B1821P57-N12	1792.5--1849.5	≤ 0.6	≥ 10 dB	1.6 * 0.8 * 0.6
LF43H1926P56-H22	1799--2052	≤ 4.0	≤ 2.0	4.5 * 3.2 * 1.6
LF43B1977P57-N104	1852--2102	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.5
LF43H2005P56-H13	1860--2150	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
LF43H2005P56-H29	1860--2150	≤ 3.5	≤ 2.0	4.5 * 3.2 * 1.6
‍LF18L2025H107-L85/K	1880--2025	≤ 1.2	≤ 1.6	1.6 * 0.8 * 0.6
LF18L2170H107-L72/M	1880--2170	≤ 0.6 / ≤ 1.5	≤ 2.0	1.6 * 0.8 * 0.6
LF43B1821P57-N12	1792.5--1849.5	≤ 0.6	≥ 10 dB	1.6 * 0.8 * 0.6
LF43B2025P56-N113	1900--2150	≤ 2.0	≤ 2.0	4.5 * 3.2 * 1.6
LF32B2025P78-N68	1900--2150	≤ 2.5	≤ 2.0	3.2 * 2.5 * 1.5
LF43H2025P56-H23	1900--2150	≤ 2.5	≤ 2.0	4.5 * 3.2 * 1.6
‍LF43H2031P68-H18	1912.5--2149.5	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.6
LF43H2049P68-H27	1945--2153	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.5
‍‍LF34B2051P45-N97	1946--2155	≤ 4.0	≤ 2.0	3.2 * 4.5 * 1.5
LF43H2060P68-H25	1971--2150	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.5
LF34B2025P45-N87	1980--2150	≤ 4.0	≤ 2.0	3.2 * 4.5 * 1.5
LF32B2090P58-N134	1980--2200	≤ 3.0	≤ 2.0	3.2 * 2.5 * 1.5
‍‍LF23B2040P56-N83	2010--2070	≤ 2.3	≤ 2.0	2.5 * 3.2 * 1.2
LF43H2221P68-H20	2192--2250	≤ 3.0	≤ 2.0	4.5 * 3.2 * 1.6
LF15L2700H1110-L122/K	2300--2700	≤ 0.5	≤ 2.0	1.0 * 0.5 * 0.38
LF18L2700H83-L90/T	2300--2700	≤ 0.5	≤ 1.5	1.6 * 0.8 * 0.6
LF15L2450H64-L131	2400--2500	≤ 0.45	≤ 1.7	1.0 * 0.5 * 0.4
‍LF18L2450H83-L17	2400--2500	≤ 0.18	≤ 1.5	1.6 * 0.8 * 0.6
LF22B2450P47-N21	2400--2500	≤ 1.8	≤ 1.5	2.5 * 2.0 * 1.2
LF21B2450H46-N36	2400--2500	≤ 1.8	≤ 2.0	2.0 * 1.25 * 0.95
LF18B2450P44-N78	2400--2500	≤ 1.7	≤ 2.0	1.6 * 0.8 * 0.6
‍‍LF21B2450H75-N171	2400--2500	≤ 1.8	≤ 2.0	2.0 * 1.2 * 0.8
‍LF18B2450P57-N174	2400--2500	≤ 1.7	≤ 2.0	1.6 * 0.8 * 0.6
‍LF21B2450P72-N176	2400--2500	≤ 1.5	≤ 2.0	2.0 * 1.25 * 0.95
‍‍‍LF18L2450H93-L56	2400--2500	≤ 1.0	≤ 2.0	1.6 * 0.8 * 0.6
LF18B5425H1411-N172	4900--5950	≤ 1.0	≤ 2.0	1.6 * 0.8 * 0.7
LF18H5375H54-H46	4900--5950	≤ 0.6	≤ 1.7	1.6 * 0.8 * 0.7
Note: Due to many product models, only some representative models are listed in the table

三、Application & attention

      Because LTCC low-pass filter has the advantages of easy welding, small size, light weight, cheap price, high device integration, good consistency, etc., LTCC low-pass filter (ceramic low-pass filter) is very suitable for mobile phones, Bluetooth modules, routers, GPS positioning, digital cameras and other microwave RF circuits. When in use, pay attention to the grounding end is well grounded, otherwise it will affect out-of-band suppression and flatness indicators. The welding temperature should not be too high and the welding time should not be too long. If reflow welding is used, the recommended temperature is recommended, and wave soldering is not recommended. Products should be stored in the ambient temperature of -10℃~40℃, relative humidity is not more than 80%, the surrounding environment is not acidic, alkaline and other harmful gases in the warehouse. Do not soak when cleaning, it is recommended to wipe with alcohol.  

      The company can customize LTCC filter, LTCC low-pass filter, LTCC high-pass filter, LTCC bandpass filter, LTCC band-stop filter, SMD ceramic filter. Because LTCC products are highly customized devices, the parameter requirements of the devices should be clearly stated before ordering. The best targets can be achieved through mutual negotiation.