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.
Today AESA antenna is becoming more popular in various systems and for further use of it, lowering cost of key component like TR module is crucial. In this paper, a design of a low cost X band GaN module is described. In this module, all devices including HPA are surface mounted on resin board with highly enforced heat dissipation method inside resin. Furthermore unique anti-radiation property with...
A high power transmitter frequently consists of two or more SSPAs (Solid State Power Amplifier), and outputs of the power amplifiers are combined by a power combiner. However, when some power amplifiers fail, a power loss in the power combiner increases because the number of the input powers vary. In this paper, a waveguide power combiner allowing for the variable number of input ports is presented...
We propose a wideband and dual polarization open-ended waveguide. Because excitation probes of the waveguide and strip lines connected to the probes are formed in the dielectric substrate, multiple elements can be fed by using the branched strip line. So the proposal makes it easy to construct array antennas. In order to array the antennas including the strip lines with suitable spacing, we propose...
The characteristics of a Wilkinson power divider frequently degrade when an isolation resistor in the Wilkinson power divider is formed by a resistance film because the resistance changes caused by manufacturing errors. In this paper, we present a stripline power divider that is insensitive to resistance variations, using a parallel resistor pair. In the proposed divider, two parallel resistors connected...
This paper presents a novel wide band forward coupler with balanced composite right/left-handed (CRLH) transmission lines. The structures of conventional couplers using CRLH transmission lines have not realized the balanced CRLH transmission lines simultaneously in even/odd modes. Therefore, a coupled band of conventional forward couplers with CRLH transmission lines had been narrow. In the proposed...
A novel forward coupler using composite right/left-handed (CRLH) transmission lines with shared short stubs is presented. Stubs of the parallel CRLH transmission lines are connected each other to share common short circuits. In this coupler, forward coupling depends on only shunt inductances in the even and odd modes because the CRLH transmission lines are not coupled and have no mutual inductances...
In this paper, we proposed a method of DOA estimation using eigenvectors and evaluated the proposed method by performing simulations and experiments in an anechoic chamber. DOA was estimated correctly in these simulations, and the effectiveness of the proposed method was confirmed. We evaluated the average of estimation errors to be about 1.4° in the anechoic chamber. These results confirmed that...
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.