Designing Bandreject filters

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A broadband reject filter can be designed by combining a lowpass filter with a cutoff frequency f_1 and a highpass filter with a cutoff frequency f_2 in parallel with a summing amplifier. Current designs may result in an unwanted peak at the center frequency, indicating that adjustments are necessary. Utilizing a higher-order equal ripple band stop filter design pattern could help achieve the desired broadband response. If this approach is ineffective, implementing ramp-up and ramp-down techniques may be required. Proper design considerations are crucial for achieving the intended filter characteristics.
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Is there a way I can design a broadband reject filter using a lowpass filter with cutoff frequency f_1 and a highpass filter with a cutoff frequency f_2,\ (f_1 \ll f_2) , combined in parallel with a summing amplifier? My current design yields a response that isn't a broadband, there is a significant bump at the center frequency. If I cannot do so, will I have to use a ramp up and a ramp down?
Sorry for having a run on sentence.
 
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try higher order equial ripple band stop filter design pattern.
 

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