新型拓展带宽毫米波开槽波导功率合成器

A Novel Structure for Enhancing the Bandwidth of the Millimeter-Wave Slotted-Waveguide Spatial Power Combiner

针对毫米波开槽波导空间功率分配/合成器相对带宽较窄,合成路数增多时带宽锐减的缺点,提出了一种新型的拓展带宽的结构。该结构采用E面改进型T形结构成多分支网络,通过减少每个功率分配/合成器的合成路数,使其在输出更大功率的同时,带宽得到拓展。在Ka频段设计了此种结构的网络,并通过1×12阵列和2×6阵列的性能比较,发现2×6阵列的带宽几乎是1×12阵列的两倍,且具有尺寸小、合成效率高和容易散热等优点,从而验证了此种结构的可行性。

Resonant slotted-waveguide spatial power divider/combiner suffers from severe bandwidth limitations.The bandwidth declines sharply as the number of slots per waveguide section increases.In order to overcome this shortcoming,a novel structure for enhancing the bandwidth of the slotted-waveguide spatial power combiner for Ka-band is presented.By the utilization of multibranching techniques based on the improved E-plane T-junctions,a reduction of the number of slots per waveguide section is assessed.Two examples of a 2×6 array with E-plane T-junction and 1×12 linear array on Ka-band are designed.Result indicates that this novel structure is an effective way of improving the bandwidth,and the bandwidth of 2×6 array is almost twice the 1×12 linear array,what is more,it provides not only a high power-combining efficiency over a wide bandwidth and flexibility in the design process,but also efficient heat sinking.As a result,this structure＇s feasibility is validated.