Cavity Filters

Compared to other filter types, cavity filters feature low insertion loss, high rejection and steep skirt selectivity, and high power handling capabilities. They are typically bandpass or band reject (notch) filters.

Cavity Filters by MCV

MCV offers a comprehensive range of cavity filters: cavity band pass, band reject, multiplexers, dual duplexers, combline band pass, interdigital, waveguide bandpass and dielectric resonator loaded cavity filters.

Request a Quote

Polemount Ultra-Narrow Band Cavity Filter by MCV Microwave

Band Type:

Frequency:

Type:

wdt_ID	Part Number	Center Frequency (MHz)	Bandwidth (MHz) (min)	I.L. in BW (dB)(max)	R.L.	Attenuation (dB)(min)	Power	Dimensions	Data sheet exists?	Band Type	Frequency	Type
1	BCC70-1A1	70	69.4~70.6	3.00	20	50 @ 67, 73 70 @ 20, 120	2	228.6x152.4x114.3	Y	VHF	Low	Band Pass
2	BCC253-2A1	253	252 ~ 254	1.50	20	40 @ 230 MHz 30 @ 300 MHz					Low	Band Pass
3	BCC344-85A1	343.5	301 ~ 386	1.20	20	60 @ 225 & 500 MHz					Low	Band Pass
4	BCC417-1.4A1	418.15	417.4 ~ 418.9	3.00	20	60 @ 380 ~ 400 MHz 60 @ 420 ~ 430 MHz					Low	Band Pass
5	BCC514-6A2	514	511 ~ 517	5.00	14	55 min @ DC ~ 505MHz 55 min @ 523 ~ 2000MHz	5	96.8x64.5x76.2	Y	UHF	Low	Band Pass
										Band Type	Frequency	Type

FAQ about Cavity Filters

What is a cavity filter?

A cavity filter is a type of RF filter that uses one or more resonant cavities to select or reject specific frequency ranges. These filters operate based on the physical dimensions of the cavities, which determine the resonant frequencies. They offer excellent performance in terms of selectivity, low insertion loss, and high power handling.

How does a cavity filter work?

Cavity filters operate on the principle of resonance. Each cavity resonates at a specific frequency, allowing signals at that frequency to pass while attenuating others. The physical dimensions of the cavities determine the center frequency and bandwidth.

What applications are cavity filters used in?

Cavity filters are commonly used in telecommunications, military, aerospace, and public safety systems where signal clarity and interference rejection are critical. They are ideal for base stations, repeaters, and high-power RF environments.

What frequency ranges do cavity filters cover?

Cavity filters can be designed to operate from VHF to microwave frequencies, typically from 30 MHz up to several GHz, depending on the application and design specifications.

What are the advantages of using cavity filters?

Cavity filters offer:

High Q factor (low insertion loss)
Excellent selectivity
High power handling
Good thermal and frequency stability
Low insertion loss over narrow bandwidths

Can cavity filters handle high power?

Yes. Due to their metallic construction and high-Q design, cavity filters can handle significant RF power levels, making them ideal for transmitter and repeater systems.

What are the common types of cavity filters?

Bandpass filters
Bandstop (notch) filters
Combline filters
Interdigital filters
Waveguide cavity filters

What is the difference between a cavity filter and a lumped-element filter?

Cavity filters use physical resonators (cavities) and are ideal for high-frequency and high-power applications.
Lumped-element filters use capacitors and inductors, are smaller, and better for low-frequency or compact systems but offer lower Q.

Can cavity filters be customized for specific applications?

Yes, cavity filters can be fully customized in terms of frequency range, bandwidth, insertion loss, physical size, and mounting options to meet the specific requirements of different systems and environments.

What key parameters should I consider when selecting a cavity filter?

Center frequency
Bandwidth
Insertion loss
Return loss
Rejection (attenuation)
Power handling
Size and weight
Environmental ruggedness

How can I order cavity filters from MCV Microwave?

To place an order for cavity filters please contact us and we will help you!