EMR Corporation Filters

Bandpass Filters Band-Reject Filters Low-Pass Filters High-Pass Filters Duplexer/Combiner Filters

EMR Corp RF Preselectors vary from single or dual cavity resonator combinations, to mult-stage inductive, aperature coupled, or combline filters. Special preselector assemblies may include one or more of these devices in combination, multiple pass and stop band characteristics, and special notch elements according to the complexity of site requrements. EMR preselectors are designed to optimize loss, selectivity, and costs; with respect to the particular site requirements and frequencies.

Product Features:

Covers the entire 66-88 MHz band
2-3 dB typical insertion loss
70 dB attenuation ±10 MHz away from center frequency

Types of Filters and Their Applications

1. Bandpass Filters

Purpose: Allow signals within a specific frequency range while attenuating others.
Applications: Used in RF communication systems to isolate desired channels and reduce interference.

2. Band-Reject (Notch) Filters

Purpose: Block a narrow range of frequencies while passing others.
Applications: Ideal for eliminating unwanted signals or interference from specific bands.

3. Low-Pass Filters

Purpose: Pass low-frequency signals and attenuate higher frequencies.
Applications: Common in audio and RF systems to reduce high-frequency noise.

4. High-Pass Filters

Purpose: Pass high-frequency signals and attenuate lower frequencies.
Applications: Used in RF systems to block low-frequency interference.

5. Duplexer/Combiner Filters

Purpose: Enable simultaneous transmit and receive on a single antenna by separating frequency bands.
Applications: Essential in base stations and repeater systems.

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EMR Corporation

EMR Corporation Filters