Ceramic Filters

Image	Part Number	Description / PDF	Quantity	Rfq
	LFB311G44SG1A558 TOKO / Murata	FILTER CER BANDPASS 1.44GHZ SMD	0
	LFB315G82SN5-996 TOKO / Murata	FILTER CER BANDPASS 5.82GHZ SMD	0
	LFB215G37BA1A233 TOKO / Murata	FILTER CER BANDPASS 5.37GHZ SMD	0
	LFB431G54SN1-822 TOKO / Murata	FILTER CER BANDPASS 1.54GHZ SMD	0
	LFB215G37SG8A180 TOKO / Murata	FILTER CER BANDPASS 5.37GHZ SMD	0
	LFB215G12SG8A183 TOKO / Murata	FILTER CER BANDPASS 5.12GHZ SMD	0
	LFB212G45BA1B763 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB215G51SG8A132 TOKO / Murata	FILTER CER BANDPASS 5.51GHZ SMD	0
	LFB32350MSC1-772 TOKO / Murata	FILTER CER BANDPASS 350MHZ SMD	0
	LFB2H2G60BB1C106 TOKO / Murata	FILTER CER BANDPASS 2.6GHZ SMD	0
	LFB2H2G60BB1B973 TOKO / Murata	FILTER CER BANDPASS 2.6GHZ SMD	0
	LFB2H2G45BB1A243 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB2H2G45BB1A221 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB215G25SG8A144 TOKO / Murata	FILTER CER BANDPASS 5.25GHZ SMD	0
	LFB2H2G59SG7B858 TOKO / Murata	FILTER CER BANDPASS 2.59GHZ SMD	0
	LFB311G40SL1A562 TOKO / Murata	FILTER CER BANDPASS 1.4GHZ SMD	0
	LFB182G60SGHB972 TOKO / Murata	FILTER CER BANDPASS 2.6GHZ SMD	0
	LFB212G45SG8B742 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB182G45SG9A213 TOKO / Murata	FILTER CER BANDPASS 2.45GHZ SMD	0
	LFB311G90SG1-799 TOKO / Murata	FILTER CER BANDPASS 1.9GHZ SMD	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.