Q Microwave - LC Filters
Q Microwave
1591 Pioneer
Way
El Cajon, CA
92020
ph: 619-258-
7322
fax: 619-444-7939
sales@qmicrowave.com
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RFQ
LC Filters
Lumped Element Filters
- Q Microwave´s miniature lumped-element filter capability extends the full frequency
range of our capability: 20 MHz to 20 GHz. The principal advantage of this type of filter is its small size.
Disadvantages include higher loss for a given rejection requirement. Typical prototype delivery is 2 to 4 weeks.
r
QLB Series Bandpass Filters
r
QLL Series Lowpass Filters
r
QLH Series Highpass Filters
r
QLN Series Notch Filters
q
QLB - 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
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Q Microwave - LC Filters
Description: QLB(Field 1)M(Field 2)P(Field 3)S(Field 4)(Field 5)
STANDARD FILTER
SPECIFICATIONS
PARAMETER
FIELD DESCRIPTION
CUSTOM PERFORMANCE
Center Frequency (Fc)
3dB Bandwidth (BW
3dB
)
Rejection
20 to 20000 MHz
5% to 20% of F
c
Characterized by Chebychev transfer
function with 2 to 6 sections. See
plots.
Field 1 (In MHz)
Field 2 (In percent)
Field 3 (In Number of
Sections)
STANDARD
PERFORMANCE
Insertion Loss (I/L)
Determined by F
c
, BW
3dB,
and
sections. See plots.
10 dB typical over 70% of BW
3dB.
See plots.
50 Ohms
20 dBm maximum
None
Return Loss
Standard
Characteristic Impedance
Input Power
ENVIRONMENTAL
CAPABILITIES
Operating Temperature
Storage Temperature
Thermal Cycles
Standard
Standard
0
o
C to +50
o
C
-65
o
C to +125
o
C
25 cycles -65
o
C / +125
o
C
Standard
Standard
Standard
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Q Microwave - LC Filters
Humidity
90%-95% relative humidity, non-
condensing environment
Standard
MECHANICAL
CONFIGURATION
Option 1
Connectorized
s
s
s
Finish - Silver or brass
I/O - SMA-Female
connectors
1.5" x 0.5" x 0.5" typ
Finish - Silver or
brass.
I/O - Formed Leads
1.5" x 0.5" x 0.5" typ
Finish - Silver or brass
I/O - Formed Leads
1.5" x 0.5" x 0.5" typ
Finish - Silver
I/O - Silver ribbon
0.5" x 0.3" x 0.3" typ
Finish - Polyamide
substrate with tin or
solder finish.
I/O - SMT
0.5" x 0.5" x 0.33" typ
Field 4 (Select "CS")
Option 2
Pins - Formed (Surface
Mountable)
s
Field 4 (Select "FS")
s
s
Option 3
Pins - Straight
Option 4
Microstrip
Option 5
Surface Mount Technology
(SMT)
s
s
s
Field 4 (Select "FA")
s
s
s
Field 4 (Select "MS")
s
Field 4 (Select "SM")
s
s
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
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Q Microwave - LC Filters
Part Number/
Description
Filter
Type
F
c
(MHz)
BW
3dB
Sect. Rejection
(MHz)
I/L
(dB)
at
F
c
2.0
I/O Style
QLB1250M120P5SCS
LE,
BPF
1250
1500
5
30 dBc @
200 MHz &
3700MHz
30 dBc @
1600 MHz
& 6000
MHz
30 dBc @
2600 MHz
& 11000
MHz
30 dBc @
6000 MHz
& 16000
MHz
30 dBc @
12000 MHz
& 18000
MHz
20 dBc @
5400 MHz
& 6200
MHz
40 dBc @
275 MHz &
425 MHz
40 dBc @
75 MHz &
225 MHz
SMA(F)
QLB3000M67P5SCS
LE,
BPF
3000
2000
5
2.0
SMA(F)
QLB6000M67P5SCS
LE,
BPF
6000
4000
5
2.0
SMA(F)
QLB10000M40P5SCS
LE,
BPF
10000
4000
5
2.0
SMA(F)
QLB15000M40P5SCS
LE,
BPF
15000
6000
5
2.0
SMA(F)
QLB5800M7P3SSM
LE,
BPF
5800
400
3
3.0
SMT
QLB350M21P5SSM
LE,
BPF
350
75
5
2.5
SMT
QLB150M33P5SSM
LE,
BPF
150
50
5
2.0
SMT
q
QLL - LUMPED ELEMENT LOWPASS FILTERS
The QLL 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.
http://www.qmicrowave.com/lc_filters (4 of 10) [02-Jun-2010 10:33:17 AM]
Q Microwave - LC Filters
Q Microwave´s QLL-Series Description & Part Number Code
Description:
QLL(Field 1)M(Field 3)E(Field 4)-(Field 5)
Note that Field 2 is not used on the QLL series filters
PARAMETER
STANDARD FILTER
SPECIFICATIONS
FIELD DESCRIPTION
CUSTOM PERFORMANCE
Cutoff Frequency (F
co
)
3dB Bandwidth (BW
3dB
)
Rejection
1500 to 8000 MHz
DC to F
co
Characterized by Chebychev transfer
function with 3 to 15 elements. See
plots.
Field 1 (In MHz)
Standard
Field 3 (In Number of
Elements)
STANDARD
PERFORMANCE
Insertion Loss (I/L)
Determined by F
c
, BW
3dB,
and
number of elements. See plots.
10 dB typical over 70% of BW
3dB.
See
plots..
50 Ohms
20 dBm maximum
None
Return Loss
Standard
Characteristic Impedance
Input Power
ENVIRONMENTAL
CAPABILITIES
Operating Temperature
Storage Temperature
Standard
Standard
0
o
C to +50
o
C
-65
o
C to +125
o
C
Standard
Standard
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