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 400 watt Gallium Nitride (GaN) Solid State Power Amplifier (SSPA) has been developed for use on navigational satellites at L-Band. This amplifier takes advantage of recent advances in high voltage GaN high-electron-mobility transistors (HEMTs), along with predistortion linearization (PDL), to achieve high output power, improved linearity, and greater power added efficiency (PAE). A peak power of...
Linearizer Technology Inc. (LTI) has developed a phase combined compact driver amplifier for millimeter-wave applications. It has a single input, and dual outputs that have individual phase shift and amplitude adjustments to drive a pair of TWT's or other high power amplifiers (HPAs). This dual output driver can also provide linearization if required.
The need for the transmission of information at ever greater data rates is moving satellites to the millimeter-wave (MMW) bands. These satellites will need linear power amplifiers (PAs) to allow the efficient transmission of this information. This paper discusses progress in advancing the state of the art of PA linearization at the Q, V and W downlink satellite bands. The use of analog predistortion...
The trend in the design of linearizers has been to integrate more and more functions with the basic distortion correction element. This paper discusses the latest development in this trend: the combining of the linearizer with the block up converter (BUC) into a single functional LBUC module. This paper will discuss the advantages of combining a BUC with a linearizer and describe an LBUC developed...
The need for the transmission of information at ever greater data rates has moved the need for linear power amplifiers (PAs) to the millimeter-wave (MW) bands. This paper discusses progress in advancing the state of the art of PA linearization to above 100 GHz. The use of analog predistortion (PD) at MW is discussed, and the characteristics of an E/W-band linearizer described. Measured performance...
The trades involved in the decision to include linearization in the design of a microwave high power amplifier will be discussed. Emphasis will be placed on the use of predistortion linearization, and particularly on its application with amplifiers employing recently available microwave GaN FET power devices.
The linearizer/channel amplifier (L/CAMP) described in this paper is designed for use on a satellite. It employs an active FET predistortor with a very wideband frequency response and electrically controllable nonlinear characteristics that can be tailored over frequency to adjust for a wide range of power amplifier (PA) nonlinear characteristics. It can be used with either a TWTA or an SSPA. It is...
The trades involved in the decision to include linearization in the design of a microwave high power amplifier will be discussed. Emphasis will be placed on the use of predistortion linearization, and particularly on its application with amplifiers employing recently available GaN FET power devices. Both digital and analog techniques will be considered.
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.