LCS "LC" BANDPASS FILTERS
 Details
Standard Characteristics

LCS Filters are constructed using large crosssection inductors and very stable capacitors. This technique minimizes insertion loss and maximizes ruggedness. Internal parts are firmly soldered, but are spotpotted for improved reliability and stability. All joints are microscopically inspected. These filters use a circuit which provides essentially symmetrical stopband slopes, even for broadband models.
LCS Filters are available with center frequencies from 10 Mhz to 2000 Mhz, with bandwidths ranging from 3% to 80% and with up to 10 sections. Both stopband skirts will fall within 10% (in dB) of a .01 dB Chebychev finite Q design. For example, if a lossless design exhibited 70 dB attenuation, a finite loss approximation might display 67 dB and the LCS unit at least 60 dB attenuation. A typical inductorsubmitted circuit is shown below:
Specifications
Series LCS1  Series LCS2  
Frequency Range (Mhz)  101000  102000 
3 dB BW Percent of Center Frequency  3%80%  3%80% 
VSWR  1.5:1 or less  1.5:1 or less 
Number of Sections  310  310 
Impedance (Ohms)  50*, 70, 93  50*, 70, 93 
Power Average (Watts)  10  20 
Shock  30 G’s  30 G’s 
Vibration  10 G’s  10 G’s 
Humidity  95%  95% 
Temperature  55 to +85 C  55 to +85 C 
*50 Ohms Standard
Insertion Loss Loss vs. Frequency for LCS Filters
To determine the maximum insertion loss in the passband, the following formula is used.
Insertion Loss = (Loss Constant) x (No. of Sections + 1/2) + 0.4 Percent 3dB BW
For Bandpass Filter Series  Loss Constant 
LCS1  5.5 
LCS2  6 