In this paper, an X-band H-plane band pass filter based on substrate integrated waveguide (SIW)

technology is introduced. Back propagation neural network (BPNN) method is applied to optimize parameters of the proposed ...

In this paper, a low profile and wideband backward-wave directional coupler is introduced. It

operates similar to the composite right left handed (CRLH) couplers. Two different mechanisms including

connections ...

In this paper a new procedure for designing forward-wave directional couplers using periodic shunt

short circuited stubs is proposed. A new type of cell using these stubs, which enlarge the pahse

difference ...

In this paper two wideband Forward-Wave Directional Couplers (FWDCs) with 0 dB and 3 dB coupling level are proposed. Using periodic patterned ground structure in a microstrip coupled lines by a new unit cell; even- and ...

In this paper sensitivity analysis of a wideband backward-wave directional coupler due to fabrication imperfections is done using Monte Carlo method. For using this method, a random stochastic process with gaussian ...

This paper presents an X-band cavity filter based on substrate integrated waveguide (SIW) technology. It consists of four cross coupled cavities working at 9.74 GHz. Neural network optimization procedure is applied to ...

In this paper a new technique is proposed to improve the directivity and directivity bandwidth of couplers. In this approach, a low pass filter has been inserted before isolation port. It is shown that this technique can ...

The current paper presents a wideband forward-wave directional coupler. Periodic shunt structure is employed to design the proposed coupler. Using even- and odd-mode analysis, it is shown that even- and odd-mode characteristic ...

This paper presents a study of wideband backwardwave directional coupler. In designing the proposed coupler, neural network technique is employed for optimization procedure. Composite Right Left Handed (CRLH) behavior of ...