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.
An ultra-wide tuning range filtering antenna is proposed in this paper. The frequency tuning range is from 200 MHz to 1.8 GHz which covers from P to L bands by a varactor and two single-pole-doube-throw switches. The switches controls two groups of inductors which corresponding to two frequency tuning range. The filtering antenna has high selectivity and low insertion loss and very wide frequency...
In this paper, a low-profile dual-polarized antenna integrated with bandpass filter based on dual-mode open-loop resonant is proposed. The antenna design employs the concept of multistacked square patches fed by two probes located in two orthogonal directions. The two bandpass filters used to feed the antenna are on the bottom layer which share the same ground with the antenna. Both the separate and...
The catalytic performance of an amorphous mesoporous aluminophosphate (AlPO) was investigated for the transesterification of diethyl carbonate (DEC) with dimethyl carbonate (DMC) to synthesize ethyl methyl carbonate (EMC). Compared with other solid acid and/or base catalysts, the mesoporous AlPO showed remarkably high activity, stability and recoverability for the reaction. We proposed that the presence...
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.