Novel ultra-wideband power divider based on LTCC

Abstract

The invention discloses a novel ultra-wideband power divider based on LTCC. The power divider comprises an ultra-wideband balun and a 180-degree ultra-wideband phase shifter, wherein the ultra-wideband balun part is formed by three ports of a strip line-defected ground structure, the phase shifter part is formed by a folded transmission line and a reference straight wire, an unbalanced output portof the ultra-wideband balun is connected with an input end of a phase shifting channel of the wideband 180-degree phase shifter, and another unbalanced output port of the balun is connected with an input end of the reference straight wire of the phase shifter, so that the power divider with ultra-wideband performance is formed. The ultra-wideband power divider has the advantages of small volume,simple circuit structure, ability of realizing large-scale production, wide bandwidth, flat passband, low echo loss and consistent power and phase of output signals of the output port. In addition, the ultra-wideband power divider is convenient to install in the using process, capable of independently serving as a component and applicable to a feed network of a power amplifier and an array antenna.

Description

technical field [0001] The invention belongs to the field of microwave technology, in particular to a novel ultra-wideband power splitter based on LTCC. Background technique [0002] The introduction of ultra-wideband technology can be traced back to the late 1950s. With the accuracy requirements of positioning systems in the military field, ultra-wideband began to attract people's attention. With the development of modern communication technology, the application range of wireless communication is becoming wider and wider. The bandwidth range of electronic components in the past can no longer be widely used in modern communication systems. Therefore, ultra-wideband technology has gradually attracted the attention of domestic and foreign scholars. What follows is the generation of various ultra-wideband electronic devices in wireless communication systems. [0003] As an important role in the radio frequency communication system, the power splitter has higher and higher req...

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Problems solved by technology

[0003] As an important role in the radio frequency communication system, the power splitter has higher and higher requirements for its miniaturization, broadband, and low loss. As early as 1974, the structure of the ring bridge was first proposed by scholars, and more and more scholars studied it. More and more, until now, the ring bridge has also been used in various radio frequency integrated circuits, but the balance of the ring bridge is poor, so its application frequency range is narrow, and the bandwidth is generally only between 10% and 20%. space, and relatively large

In order to make the power divider have better performance, some scholars proposed a new type of Wilkinson power divider in 1960. This power divider improves the isolation of each port, and can achieve matching, and the structure is relatively simple. It is a kind of power splitter that is commonly used in the field of microwave technology at present, but its disadvantage is that the working frequency band is narrow, and it cannot realize the application of broadband or even ultra-wideband. Therefore, it is of great research significance to study ultra-wideband power splitters.

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