Device Overview

General Description

The FB series bandpass filters are CAD-optimized microstrip filter designs built on a low-loss substrate. These filters feature low insertion loss, excellent return loss and are suitable for high rejection filtering.

Photo of FB-0785

Features

  • Low Insertion Loss
  • Excellent Return Loss
  • High Stop Band Suppression
  • Wide Stop Band
  • Sharp Roll-Off

Applications

  • Test and Measurement Equipment
  • SATCOM
  • Radar
  • RF Transceivers

Functional Block Diagram

Block Diagram

Part Ordering Options

Part NumberDescriptionConnectorsGreen StatusProduct LifecycleExport Classification
FB-07857.85 GHz Bandpass FilterStandard

Non-RoHS

ReleasedEAR99

Table Of Contents

Revision History

Revision CodeRevision DateComment
-2012-09-26Datasheet Initial Release

Rev: - | Copyright © 2012 Marki Microwave LLC.

2

Port Configuration and Functions

Port Diagram

Diagram of the port configuration for FB-0785

Port Functions

PortFunctionConnector TypeDescriptionDC Equivalent
Circuit
Port 1Input/Output SMAFPort 1 is DC open to Port 2 and GND. GND is provided through the case and RF connectors.Equivalent circuit for the Input/Output
Port 2Input/Output SMAFPort 2 is DC open to Port 1 and GND. GND is provided through the case and RF connectors.Equivalent circuit for the Input/Output

Rev: - | Copyright © 2012 Marki Microwave LLC.

3

Specifications

Absolute Maximum Ratings

ParameterMaximum RatingUnit
RF Power Handling 1W

Package Information

ParameterDetailsRating
Weight-33g
Dimensions-43.18 x 18.8 mm

Rev: - | Copyright © 2012 Marki Microwave LLC.

4

Electrical Specifications

Specifications guaranteed from -55 to +100°C, measured in a 50Ω system

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
1 dBc Passband Temp = 25°C
7.29 8.49---GHz
3 dBc Passband Temp = 25°C
7.29 8.49---GHz
30 dBc Rejection Point Temp = 25°C
6.63 9.15---GHz
Center Freq Temp = 25°C
- --7.87-GHz
Insertion Loss @ fc Temp = 25°C
- --1.93.0dB
Passband Return Loss Temp = 25°C
- -1014-dB
Group Delay Temp = 25°C
- --994-ps
Impedance Temp = 25°C
- --50-Ω
Stopband Suppression 25°C
6.3 9.425-30dB
Stopband Suppression Configuration A, 25°C
5.5 10.240-50dB

Rev: - | Copyright © 2012 Marki Microwave LLC.

5

Typical Performance Plots

Magnitude response for a typical FB-0785 graph for FB-0785

Rev: - | Copyright © 2012 Marki Microwave LLC.

6

Typical Performance Plot

Insertion Loss (dB) graph for FB-0785
Insertion Loss (dB) graph for FB-0785
Return Loss (dB) graph for FB-0785
Return Loss (dB) graph for FB-0785
Group Delay (ps) graph for FB-0785

Rev: - | Copyright © 2012 Marki Microwave LLC.

7

Mechanical Data

Rev: - | Copyright © 2012 Marki Microwave LLC.

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