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LUMPED ELEMENT HIGHPASS FILTERS

The QLH 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 QLH-Series Description & Part Number Code

Description: QLH(Field 1)M(Field 2)X(Field 3)E(Field 4)-(Field 5)

PARAMETER

STANDARD FILTER SPECIFICATIONS

FIELD DESCRIPTION

CUSTOM PERFORMANCE

   

Cutoff Frequency (Fco)

1000 to 20000 MHz

Field 1 (In MHz)

3dB Bandwidth (BW3dB)

Specified in multiple of the cutoff frequency (e.g., by specifying "3" in this field indicates a passband of 3 times Fco)

Field 2 (In Multiples of Fco)

Rejection

Characterized by Chebychev transfer function with 3 to 12 elements. See plots.

Field 3 (In Number of Elements)

STANDARD PERFORMANCE

   

Insertion Loss (I/L)

Determined by Fco, BW3dB, and number of elements. 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 QLH-Series Filters

Part Number/ Description

Filter Type

Fco (MHz)

BW3dB (MHz)

Elmt

BW40dBc (MHz)

I/L (dB)

I/O Style

QLH500M4X7ECS

LE, HPF

500

500-2000

7

40 dBc @ 250 MHz

1.5

SMA(F)

QLH1000M4X7ECS

LE, HPF

1000

1000-4000

7

40 dBc @ 500 MHz

1.5

SMA(F)

QLH2000M3X7ECS

LE, HPF

2000

2000-6000

7

40 dBc @ 1000 MHz

1.5

SMA(F)

QLH4000M2X7ECS

LE, HPF

4000

4000-8000

7

40 dBc @ 2000 MHz

1.5

SMA(F)

QLH8000M2X7ECS

LE, HPF

8000

8000-16000

7

40 dBc @ 4000 MHz

1.5

SMA(F)

 

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