"MP" SERIES MINIATURE BANDPASS FILTERS
Standard Characteristics
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Bandpass
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Broadband designs are skirt-compensated for symmetry
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10 to 2000 MHz
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Tchebychev response standard
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Bandwidth from 3% to 100%
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Butterworth, Maximally Flat Delay and others available
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2 to 8 Sections
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Many Available Packages
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Rugged, High Q Construction
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50, 70 and 93 Ohm
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Operates in MIL environment, including Designs temperature, altitude, etc.
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1.5 VSWR over Ripple Bandwidth
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Metal Packages
The MP series miniature bandpass filters provide the best combination of
loss, selectivity and miniature size available today. Covering the range
of 10 to 2000 MHz, these bandpass filters are available in a variety of
packages, with bandwidths from 3% to 25%, and with 2 to 8 sections. Using
the network structure proven in our LCS series filters, we are able to
provide symmetrical skirt characteristics for the MP series filters, if
required. The standard response curves are shown on the following pages.
We encourage you to use the standard response monographs following, but
caution that RS Microwave should be consulted for any specifications not
found in these graphs. Also available in similar packages are "MB" bandstop
filters, "ML" lowpass filters and "MH" high pass filters. Consult RS Microwave
for your requirements.
MP series filters are constructed using standard parts in a quality intensive
environment. In common with all RS Microwave products, the MP filters are
built and tested in accordance with MIL-45208. Thus, the filters are delivered
quickly, reliably and "to-spec".
To help you determine the MP Bandpass
filter most suitable for your application, the following data is required:
1. Maximum attenuation at center of frequency.
2. Minimum attenuation at the rejection frequencies.
3. Input and Output Impedance.
4. Minimum 3 dB Passband.
5. Minimum Ripple Bandwidth.
6. Package Constraints.
7. Special Requirements (power, delay, environment, etc.)
Use the following special monographs to choose the number of sections.
Then, select your package style.
MAXIMUM INSERTION LOSS AT THE CENTER FREQUENCY
The insertion loss of MP filters can be calculated at center frequency
as follows:
Maximum Insertion Loss =
(Loss Constant) x (No. of Sections + 0.5) + 0.4
percent dB BW
LOSS CONSTANTS
Frequency MHz
Constant
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10 - 150
6.5
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151 - 250
7.4
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251 - 400
5.2
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401 - 600
4.6
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601 - 800
4.0
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801 - 1000
3.2
MONOGRAPH FOR 15-25% BANDWIDTH
The following formulas will help you define your percent bandwidth and
other parameters needed for the use of the Monograph:
Instruction for using the Monographs:
1. Use the Monograph. (Percent Bandwidth)
2. Calculate the normalized rejection.
3. Align the lower edge of a ruler with the reference marker and the
calculated normalized rejection frequency.
4. Read the attenuation for the proper number of sections.
To find the number of sections required when knowing
the attenuation of the rejection frequencies only:
INSERTION LOSS CALCULATION EXAMPLE:
Fo = 100 Mhz Percent Bandwidth = 10
Number of Sections = 5
NORMALIZE REJECTION FREQUENCY:
Calculation Example: Required to know the Attenuation
at 120 MHz
NRF = (120-100) / 10 = +2
CALCULATION:
The loss constant for a 100 MHz Fo = 6.5
Ins Loss = (6.5x (5+ 0.5) / 10) + 0.4 = 3.975 dB.
From the 10% Monograph, aligning a ruler with the reference marker and
+2, we get 41 dB for 5 sections.
STANDARD PACKAGING FOR M SERIES
FILTERS
ORDERING AN MP SERIES BANDPASS FILTER
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PC MOUNT: P
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SMA PLUG: S
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SMA JACK: M
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NON-STANDARD: N (PLEASE SPECIFY)
A. FILTER TYPE
B. STYLE NUMBER
C. NO. OF SECTIONS
D. 3 DB BANDWIDTH
E. CENTER FREQUENCY
F. INPUT CONNECTOR
G. OUTPUT CONNECTOR
THE MINIATURE SERIES FILTERS ARE ALSO AVAILABLE AS:
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MH - MINIATURE HIGHPASS
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ML - MINIATURE LOWPASS
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MB - MINIATURE BANDSTOP
PLEASE CONTACT RS MICROWAVE FOR YOUR BANDSTOP, LOWPASS, AND HIGHPASS
REQUIREMENTS. MANY OTHER PACKAGES ARE AVAILABLE.