A Novel Power Divider Integrated With One Bandpass Filter

Abstract

Abstract-A novel compact wideband inphase multilayer power divider based on slotline-to-microstrip coupling structure is presented in this paper. To improve the isolation between output ports, this power divider breaks the conventional half-wavelength slotline configuration and introduces a lumped resistor. A wideband bandpass filter integrated with the power divider is designed to allow the power divider to reject the undesired signals located in adjacent frequency channels. This filter consists of two Eshape units. In order to improve its performance at low frequency band, a lumped capacitor is bridged between the two E-shape units. As an example, a wideband power divider combining with a bandpass filter is designed and fabricated. The experimental results show that the proposed power divider has a low insertion loss, high isolation, good return losses at all ports, good amplitude and phase balance, as well as flat group delay over the wide frequency band from 3.5 GHz to 10 GHz. In addition, the width of upper stopband reaches up to 3.8 GHz (12.9 GHz-16.7 GHz) corresponding to attenuation more than 20 dB.

On the design of equal division single-band filtering dividers with an extended transmission line and resistor as isolation elements

“…For this purpose, many types of BPF have been integrated in PDs with different isolation element(s)/techniques employed between the output ports. An ultra-wideband implementation of the filtering divider with a resistor and capacitor (RC) as isolation elements was presented in [2]. The achieved output port isolation and RL was 18 dB and 13 dB, respectively.…”