Ceramic Filters

Image	Part Number	Description / PDF	Quantity	Rfq
	LFB213G60SG8B831 TOKO / Murata	FILTER CER BANDPASS 3.6GHZ SMD	0
	LFB212G45SG8A125 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB2H2G45SG7C093 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB2H5G78SG7A175 TOKO / Murata	FILTER CER BANDPASS 5.78GHZ SMD	0
	LFB311G48SG1-985 TOKO / Murata	FILTER CER BANDPASS 1.48GHZ SMD	0
	LFB312G45SG2A509 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB2H2G54SG7B881 TOKO / Murata	FILTER CER BANDPASS 2.54GHZ SMD	0
	LFB321G64SN4-761 TOKO / Murata	FILTER CER BANDPASS 1.64GHZ SMD	0
	LFB2H2G45SG7B734 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB212G45SG8A131 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB31915MSL1A508 TOKO / Murata	FILTER CER BANDPASS 915MHZ SMD	0
	LFB315G51SG2A601 TOKO / Murata	FILTER CER BANDPASS 5.51GHZ SMD	0
	LFB213G55BA1B974 TOKO / Murata	FILTER CER BANDPASS 3.55GHZ SMD	0
	LFB215G78SG8A170 TOKO / Murata	FILTER CER BANDPASS 5.78GHZ SMD	0
	LFB212G49SG8B830 TOKO / Murata	FILTER CER BANDPASS 2.49GHZ SMD	0
	LFB432G45SN1-629 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB321G74SN1-770 TOKO / Murata	FILTER CER BANDPASS 1.74GHZ SMD	0
	LFB211G90SG8B704 TOKO / Murata	FILTER CER BANDPASS 1.9GHZ SMD	0
	LFB322G45SN1-947 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB152G45CB2D320 TOKO / Murata	CER FILTER 2.45GHZ BAND PASS	0

Ceramic Filters

1. Overview

Ceramic filters are electronic components utilizing ceramic materials' dielectric or piezoelectric properties to selectively pass or reject specific frequency bands. Their high Q-factor, compact size, and temperature stability make them critical in RF/microwave signal processing systems. Modern wireless communication, IoT devices, and industrial sensors rely on ceramic filters for signal integrity and interference suppression.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Dielectric Ceramic Filters	High permittivity, low loss tangent, suitable for GHz-range filtering	5G base stations, WLAN routers
Piezoelectric Ceramic Filters	Convert electrical/mechanical energy, precise frequency control	Ultrasonic cleaners, medical imaging
Monolithic Ceramic Filters	Integrated multilayer structure, wide bandwidth	Automotive radar, GPS modules
LTCC Filters	Low-temperature co-fired ceramic, multilayer integration	Smartphones, wearable devices

3. Structure and Composition

Typical ceramic filter structures include:

Ceramic substrate: Alumina (Al O ), Zirconia (ZrO ), or Titanate materials
Conductive elements: Silver/palladium electrodes with precise patterning
Encapsulation: Epoxy or metal housing for environmental protection
Temperature compensation: Special dopants to stabilize frequency drift

Cross-sectional design optimizes electromagnetic field distribution through resonator coupling.

4. Key Technical Specifications

Parameter	Description	Importance
Frequency Range	Operational bandwidth (MHz-GHz)	Determines application suitability
Insertion Loss	Signal attenuation in passband (0.5-5 dB)	Impacts system sensitivity
Bandwidth (BW)	3dB bandwidth (1-1000 MHz)	Defines frequency selectivity
Temperature Stability	50 ppm/ C typical	Ensures operational reliability
Power Handling	1-100 W maximum	Limits in high-power applications

5. Application Fields

Major application areas:

Telecommunications: 5G NR filters, Wi-Fi 6E front-end modules
Automotive: 77GHz millimeter-wave radar systems
Medical: MRI machine RF coils and ultrasound probes
Industrial: Wireless sensor networks for predictive maintenance

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Murata Manufacturing	NFU087HC Series	0.6-6.0 GHz, 1.0dB insertion loss
TDK Corporation	CKF1010 Series	GPS L1/L2 dual-band filtering
Kemet Electronics	KC_LF Series	LTCC technology for IoT devices
Qorvo Inc.	QM78003	5G massive MIMO filter array

7. Selection Guidelines

Key selection factors:

Match frequency specifications with system requirements
Evaluate power handling in high-power applications
Consider temperature stability for harsh environments
Verify packaging compatibility (SMD/BGA/connectorized)
Assess cost-performance balance for volume production

8. Industry Trends

Emerging trends include:

Sub-6GHz and mmWave filter development for 6G
AI-driven filter design optimization
Nano-ceramic materials for higher Q-factors (Q>10,000)
Integration with antenna systems (Antenna-in-Package)
Environmental compliance (RoHS, REACH)

Market forecasts predict 8.2% CAGR through 2030, driven by 5G infrastructure and automotive radar demand.