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rejection band
In addition, the rejection band can be easily tuned for centre frequency, VSWR and rejection bandwidth by adjusting the slit parameters.
      
By increasing the per unit length inductance of the stub, the required resonator lengths can be reduced and the width of the rejection band increased.
      
Both the passband and the rejection band as a function of the frequency referred to the mixer input are aligned to LO1.
      
In the rejection band, the tangential electric field intensity across the middle gap is reduced by 15 dB from the peak intensity value.
      
Thus in order to adjust the rejection band of filters, the main and small slit dimensions can be changed.
      
Therefore with these structures a broad rejection band can be obtained.
      
The insertion loss in the pass band is less than 2.5 dB, and the attenuation of the rejection band is higher than 35 dB.
      
The proposed structure shows a broad rejection band up to 10 GHz.
      
The out-of-band characteristics of a bandpass filter can be effectively improved by generating attenuation poles in the rejection band.
      
The periodic nature of the interleaver filter reduces the number of Fourier components required for a flat passband and high-isolation rejection band.
      
 

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