Band Pass Filter Using U-shaped strips with T-shaped Feed Lines

A band pass filter with tilted ladder shaped patch and U-shaped geometries is proposed in this paper. Feed are connected at the end of open ended stubs. Presented filter is suitable for the application of wireless application in L-band range. A flat passband response can be achieved when it is employed to implement a bandpass filter. The resonator also exhibits attenuation poles close to the edges of the passband, thereby offering sharp rejection in the bandpass filter response. Moreover, since the signal applied at the input port is effectively forced to travel mainly through the transmission line path over the passband frequency, the loss incurred by the coupled lines is minimized. Extensive theoretical analysis of the rectangular ring and design example of the bandpass filter prototypes based on the ring structure is given. The proposed geometry is simulated through ie3d software, and results are purely based on the simulation results. Keywords— U-shaped patch, tilted patch line, pass-band