The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A new method of compact branch-line coupler is presented in this paper. The method utilizes nonuniform transmission lines (NTLs) instead of uniform transmission lines (UTLs) in each arm of branch-line. The normalized width w(z) /h function of the NTLs which is expanded in a truncated Fourier series is used for optimization. A 2-GHz branch-line coupler is designed, fabricated and measured. The measurement...
A novel compact dual-band branch-line coupler is proposed, which consists of four E-shaped dual-band transmission lines. The even-odd mode method is adopted to obtain the input admittance of the E-shaped transmission line. Letting the admittance matrix of the E-shaped transmission line and the conventional quarter-wavelength transmission line be identical in two frequencies, then the dual-band coupler...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.