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LUMPED ELEMENT BANDPASS FILTERS

The QLB standard lumped element product series offers a wide variety of high-performance filters. Selectable or customized features are indicated by Q Microwave´s part number convention and the definitions provided in the description table.

Q Microwave´s QLB-Series Description & Part Number Code

Description: QLB(Field 1)M(Field 2)P(Field 3)S(Field 4)(Field 5)

PARAMETER

STANDARD FILTER SPECIFICATIONS

FIELD DESCRIPTION

CUSTOM PERFORMANCE

   

Center Frequency (Fc)

20 to 20000 MHz

Field 1 (In MHz)

3dB Bandwidth (BW3dB)

5% to 20% of Fc

Field 2 (In percent)

Rejection

Characterized by Chebychev transfer function with 2 to 6 sections. See plots.

Field 3 (In Number of Sections)

STANDARD PERFORMANCE

   

Insertion Loss (I/L)

Determined by Fc, BW3dB, and sections.  See plots.

None

Return Loss

10 dB typical over 70% of BW3dB. See plots.

Standard

Characteristic Impedance

50 Ohms

Standard

Input Power

20 dBm maximum

Standard

ENVIRONMENTAL CAPABILITIES

   

Operating Temperature

0oC to +50oC

Standard

Storage Temperature

-65oC to +125oC

Standard

Thermal Cycles

25 cycles  -65oC / +125oC

Standard

Humidity

90%-95% relative humidity, non-condensing environment

Standard

MECHANICAL CONFIGURATION

   

Option 1

Connectorized

  • Finish - Silver or brass
  • I/O - SMA-Female connectors
  • 1.5" x 0.5" x 0.5" typ

Field 4 (Select "CS")

Option 2

Pins - Formed  (Surface Mountable)

  • Finish - Silver or brass.
  • I/O - Formed Leads
  • 1.5" x 0.5" x 0.5" typ

Field 4 (Select "FS")

Option 3

Pins - Straight

  • Finish - Silver or brass
  • I/O - Formed Leads
  • 1.5" x 0.5" x 0.5" typ

Field 4 (Select "FA")

Option 4

Microstrip

  • Finish - Silver
  • I/O - Silver ribbon
  • 0.5" x 0.3" x 0.3" typ

Field 4 (Select "MS")

Option 5

Surface Mount Technology (SMT)

  • Finish - Polyamide substrate with tin or solder finish.
  • I/O - SMT
  • 0.5" x 0.5" x 0.33" typ

Field 4 (Select "SM")

SPECIAL OPTIONS

A variety of special options are available.  Unlimited special options may be included in Field 5. Consult Q Microwave´s Sales Office for details.

Field 5

Select QLB-Series Filters

Part Number/ Description

Filter Type

Fc (MHz)

BW3dB (MHz)

Sect.

Rejection

I/L (dB) at Fc

I/O Style

QLB1250M120P5SCS

LE, BPF

1250

1500

5

30 dBc @ 200 MHz & 3700MHz

2.0

SMA(F)

QLB3000M67P5SCS

LE, BPF

3000

2000

5

30 dBc @ 1600 MHz & 6000 MHz

2.0

SMA(F)

QLB6000M67P5SCS

LE, BPF

6000

4000

5

30 dBc @ 2600 MHz &  11000 MHz

2.0

SMA(F)

QLB10000M40P5SCS

LE, BPF

10000

4000

5

30 dBc @ 6000 MHz & 16000 MHz

2.0

SMA(F)

QLB15000M40P5SCS

LE, BPF

15000

6000

5

30 dBc @ 12000 MHz & 18000 MHz

2.0

SMA(F)

QLB5800M7P3SSM

LE, BPF

5800

400

3

20 dBc @ 5400 MHz & 6200 MHz

3.0

SMT

QLB350M21P5SSM

LE, BPF

350

75

5

40 dBc @ 275 MHz & 425 MHz

2.5

SMT

QLB150M33P5SSM

LE, BPF

150

50

5

40 dBc @  75 MHz & 225 MHz

2.0

SMT

 

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481 Cypress Lane, El Cajon, California 92020-1605
Phone: 619-258-7322 • Fax: 619-444-7939 • Email:
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