It is not uncommon for the cost of the phase shifters to represent nearly half of the cost of the entire electronically scanned array. Phase shifters are most important for electronically scanned phase array antennas that allow the antenna beam to be steered in the desired direction without phYSically re-positioning the antenna. Possible internal circuitry for this black box will be described subsequently. Figure 1 illustrates the above concept of a phase shifter as a black box.
Most phase shifters (including all that will be covered here) are reciprocal networks, meaning that they work effectively on signals passing in either direction. While the loss of a phase shifter is often overcome using an amplifier stage, a smaller loss leads to less stringent amplifier requirements. Ideal phase shifters provide low insertion loss, and equal transmission amplitude (or loss) in all phase states. Mathematically, the transmission phase angle (phase of S21) of a two-port network should be electrically controllable while IS21 1 should be almost 1. Our focus is on two-port planar circuits with one or more electrical control inputs which determine the phase shift from the input to the output port.Ī phase shift circuit is designed to alter the phase of an input microwave signal on the basis of electrical control signals given to the component (usually digital) and output the resultant signal. There is of course another, equally important, category of phase shifters, namely the ferrite-based devices for high-power applications which will not be covered here. These circuits are planar, and are useful for low-to-medium power levels with very high switching speeds. In this paper we will review some of the commonly used phase shifter circuits which are realized using solid-state devices. This class comprises mainly three components - switches, attenuators and phase shifters.
DelhiĪmong the large number of microwave components that are at the heart of many communication, radar and other electronic systems, there is a class of components known as 'control components'. Theory and Design of Solid-state Microwave Phase ShiftersĪnanjan Basu and Shiban K Koul Centre for Applied Research in Electronics, I.I.T. Terms & Conditions of access and use can be found at Any substantial or systematicreproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in anyform to anyone is expressly forbidden. This article may be used for research, teaching, and private study purposes. Taylor and Francis shall not be liable forany losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoeveror howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use ofthe Content. The accuracy of the Content should not be relied upon andshould be independently verified with primary sources of information.
Any opinions and views expressed in this publication are the opinions and views of the authors, andare not the views of or endorsed by Taylor & Francis. However, Taylor & Francis, our agents, and our licensors make norepresentations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of theContent. Taylor & Francis makes every effort to ensure the accuracy of all the information (the Content) containedin the publications on our platform. To cite this article: Ananjan Basu & Shiban K Koul (2009) Theory and Design of Solid-state Microwave Phase Shifters, IETEJournal of Education, 50:1, 9-18, DOI: 10.1080/09747338.2009.10876048 Theory and Design of Solid-state Microwave PhaseShiftersAnanjan Basua & Shiban K Koulaa Centre for Applied Research in Electronics, I.I.T. IETE Journal of EducationPublication details, including instructions for authors and subscription information: This article was downloaded by: On: 11 November 2014, At: 12:15Publisher: Taylor & FrancisInforma Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House,37-41 Mortimer Street, London W1T 3JH, UK
0 kommentar(er)
