دانلود رایگان مقاله لاتین تراکم پیکربندی از سایت الزویر
عنوان فارسی مقاله:
تراکم پیکربندی مجدد جدا کننده قدرت با عدم اتصال
عنوان انگلیسی مقاله:
Compact reconfigurable power divider with low insertion loss
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Recently, the development in the wireless communication systems have made more demands on the circuits’ integration, which means that the circuit with a compact size can realize more functions than before. For example, a component with the reconfigurability can possibly make the wireless system easy to integrate, such as a reconfigurable filter [1–4]. Meanwhile, power divider is an important device in the wireless communication systems [5–11]. It is usually used in the feeding network of the antenna, balanced amplifier and power combining. So a power divider with the recon- figurable ability can enhance the circuit design flexibility and cater to the demands mentioned before. There are several functions of reconfigurability in the power divider’s design, such as the number of the output ports, the working frequency and the power dividing ratio [12–16]. In [12], switches were used to change the states of the output ports number. The working frequency was fixed and the four working states can be changed. However, the six pin diodes used in the power divider’s design made the circuit and the feed of the diodes complex, which made the insertion loss worsen. In [13], a power divider with tunable frequency ability was presented. Four BST (barium–strontium–titanate) varactors were used to change the working frequency continuously. The circuit had a compact size owing to the usage of varactors. However, due to the four varactors used, the power divider’s insertion loss was larger than 1.2 dB. ∗ Corresponding author.Tel.: +86 13708195502. E-mail addresses: ksong@uestc.edu.cn, kaijun.song@hotmail.com (K. Song). In [14], a power divider with tunable power ratio was proposed. The circuit included three impedance transformers and required a single biasing voltage control. Because of the usage of only two diodes, the power divider’s insertion loss was 0.6 dB. In general, in the reconfigurable systems, the utilization of many diodes, such as pin diodes or varactor diodes, may complicate the structure and deteriorate the insertion loss. In this letter, a compact reconfigurable power divider with the working frequency from 0.7 GHz to 1.01 GHz is designed and fabricated. The working frequency can be tuned continuously. In order to enhance the circuit’s performance and reduce the circuit’s size, only two varactor diodes with different biasing voltages are used to realize the configurability. The two diodes separately tune the return loss of the input port and the return loss of two output ports along with the isolation between the two output ports. Compared to other works done before [11–15], the proposed tunable power divider has the advantages of small size, low insertion loss, good isolation, good return loss and only two diodes.
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