دانلود رایگان مقاله تراکم پیکربندی مجدد جدا کننده قدرت با عدم اتصال

Abstract

A compact low insertion loss reconfigurable power divider using two varactor diodes is presented in this letter. Design methods along with analysis equations are provided. The reconfigurable responses are realized by tuning the controlling voltages of the two varactor diodes thereby resulting compact size and less loss. One diode is used to tune the return loss of the input port and the other diode is utilized to tune the return loss of the two output ports and the isolation between the two ports. The tuning frequency range is from 0.7 GHz to 1.01 GHz. A reconfigurable power divider is designed, fabricated and measured to validate the proposed methods. The power divider has the merits of compactness, low insertion loss, good isolation between two output ports, good return loss, and only two varactor diodes.

Simulation and measurement

In order to testify the proposed method, a reconfigurable power divider using the above topology is constructed on substrate Taconic RF-35 with a relative dielectric constant of 3.5, thickness of 0.508 mm and loss tangent of 0.0018. The varactor diode is Skyworks’ SMV1231 with the equivalent capacitor ranging from 0.466 pF to 2.35 pF. Table 1 shows the details of the calculated and simulated capacitor of Ca and Cb.As can be seen, difference is not big at the working frequency 0.7 GHz. But the difference deteriorates when the frequency moves higher which is caused by the range of the diodes’ equivalent capacitors. The diode’s equivalent capacitor ranges from 0.466 to 2.35 pF, which means this cannot be reached when the power divider works at 1.01 GHz. So some compromises ofthe Ca and Cb have been made in order to make the power divider works well.