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.
Due to its remarkably high Johnson figure of merit, gallium nitride (GaN) has become the material of choice for applications requiring high output power at high frequencies. In this paper, we have reviewed high-speed switching work to date and we demonstrate a 28 V, 865-MHz switching speed step-down converter that can be applied to envelope tracking (ET). We report a GaN monolithic microwave integrated...
Envelope tracking (ET) is an appealing alternative to the widely used Doherty power amplifier (PA) due to its potential to increase efficiency, particularly for high data rate transmissions. In this work, we demonstrate a 28 V, 865 MHz switching speed step-down converter that can be applied to envelope tracking. The converter's ET capability is demonstrated at up to 865 MHz PWM carrier frequency....
A non-reflective single pole four throw (SP4T) MMIC switch using ABCS InAs/AlSb HEMT process technology, designed for cryogenic temperature has been fabricated and characterized. This switch is suitable for low RF power applications that require very low insertion loss and good isolation. At 2 GHz, the SP4T switch demonstrated 0.52dB insertion loss and 33dB isolation at room temperature. At 90K, the...
This paper presents a 2-stage Low-Noise-Amplifier (LNA) MMIC which provides ultra-low-noise, broad bandwidth, and high associated gain while consuming a fairly low DC power dissipation of 20 mW. The amplifier has been fabricated using Lg = 50 nm enhancement-mode (E-mode) In0.7Ga0.3As pHEMTs on a 4-mil InP substrate. By using broad bandwidth RF chokes, the LNA exhibits an average noise figure (NF)...
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.