Based On The Design Of The Broadband Power Splitters Miniaturization Ltcc

The tendency of modern communication technology is that the RF modules will become smaller and more integrated and the frequency will become higher. With the advantages of high Q, high stability and compact size, LTCC has become the main technology of passive integrated circuits.The power divider, with the function of the power distribution and combination, is a very important passive microwave device. It is widely used in the array antenna and the high-power LO with a prominent position. The power divider using traditional craft has a very narrow bandwidth, which limits its further application. The way of multistage cascade is often used to expand the frequency bandwidth if necessary. But this will undoubtedly increase the size of the entire device, which will make difficult for the craft processing and system integration. Moreover, large size is also contrary to the current miniaturization trend of the microwave radio frequency devices.In this paper, two types of miniaturization power divider based on the LTCC technology are researched and designed. Firstly, the working principle of power divider and the basic characteristics of LTCC are introduced. Secondly, the LTCC embedded inductance and capacitance are theoretically analyzed. And then corresponding models, based on this analysis, are built with the help of HFSS electromagnetic simulation software. After that, a lumped parameter type of miniaturization power divider with those completed inductance and capacitance models is designed, manufactured and measured. Finally, the concept of ultra-wide-band (UWB) is introduced and a miniaturized UWB power divider is designed. This design takes advantage of a coupling structure of multilayer micro-strip line and slot line. In addition, part of micro-strip lines are improved into oval shape in order to achieve good impedance matching and the broadband effect at the same time. And various designing parameters are calculated with the analytical method of even and odd mode. Ultimately the whole UWB design is completed.