W-Band Hybrid Unequal Feeding Network of Waveguide and Substrate Integrated Waveguide for High Efficiency and Low Sidelobe Level Slot Array Antenna Application

الملخص EN

A W-band hybrid unequal feeding network of waveguide and substrate integrated waveguide (SIW) is presented in this paper.

It comprises a two-way hybrid waveguide-SIW E-plane divider and an unequal SIW dividing network.

Firstly, the two-way hybrid divider is developed to realize the waveguide-to-SIW vertical transition and power division at the same time.

Besides, it has a wider bandwidth and more compact configuration compared with those of conventional structures including a transition and a cascading divider.

Secondly, an SIW 1-to-16-way unequal dividing network is developed with the phase self-compensation ability.

This W-band dividing network is able to generate the desired amplitude and phase distribution.

Finally, two back-to-back SIW 16 × 16 antenna arrays are grouped and fed by the proposed feeding network.

The low sidelobe levels (SLLs) can be achieved at E- and H-plane of the antenna.

The total aperture size of the antenna is 15% less than that of a conventional antenna with a separated divider and a transition.

With such a multifunctional feeding network, the antenna is able to achieve low loss and high efficiency as well.