Abstract
OAPA This paper presents a novel power divider with a wide frequency tuning range. In our previous work, a pair of capacitors were connected in parallel with the front transmission lines of a Trantanella-type power divider introducing an additional reflection minimum together with the original reflection zero to broaden the bandwidth. In this design, the latter transmission lines are removed. The added capacitors generate a reflection minimum which can be easily controlled by varactors. Thus, the frequency band of the power divider can be flexibly tuned by altering the varactors. Design parameters are carefully chosen to eliminate the effect of the original reflection zero. By doing so, the power divider will have a tunable centre frequency instead of a tunable bandwidth. Theoretical formulas for the characteristic impedances and electrical lengths of the transmission lines of the power divider are derived and analyzed. A power divider has been designed and fabricated to demonstrate the validity of the proposed design. The measured results indicate that the power divider can achieve a frequency tuning range of 0.9-4.2 GHz (fH/fL= 4.67:1), with in-band input and output return losses both better than 22 dB, and an insertion loss of 3.2-4 dB. The measured in-band isolation is better than 15 dB. The power divider has a simple layout and a compact size of 0.2 Ωg 0.16 Ωg which demonstrates the excellent potential of the proposed power divider for modern communication systems.
Highlights
Nowadays modern communication systems usually need to support multi-communication standards, which require the components to have multiple operational bands
With the rapidly increasing demands on multi-band feature of the power dividers, there is growing attention paid to power dividers with a compact size and wide tunable frequency ranges
This paper proposes a novel power divider which has a wider tunable frequency band with a compact footprint
Summary
Nowadays modern communication systems usually need to support multi-communication standards, which require the components to have multiple operational bands. To maintain the performance in the entire tunable frequency band, [13], [14] introduced coupled-line tunable Wilkinson power dividers which have excellent input and output impedance matching (|S11| , |S22| < −17 dB) and isolation (|S23| < −25 dB). The predominant difference is that the design in [17] has one extra pair of transmission lines that connect the outputs with the isolation networks so that the frequency bandwidth of the divider can be tuned by the varactors. While the proposed divider in this work utilizes a Horst Divider structure [18], [19] In this design, the extra transmission lines were removed to eliminate the original reflection zero and maintain the additional reflection minimum which is introduced by the added varactors.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
