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.
This paper provides details on the design of a beam steerable array antenna for mobile applications at 28 GHz frequency band. The array is designed using a Rogers RT/duroid 5880 substrate material of 0.254 mm thickness and dielectric constant of 2.2. The designed antenna is fed by a 2 × 2 Butler matrix (BM) which also serve as a beam former to obtain the beam scanning of from −16 to 16 degrees. The...
A low profile antenna array designed for Customer Premise Equipment (CPE) at 800 MHz is studied in this paper. The antenna array consists of two L-shaped monopole antennas and a feeding network. By properly designing the phase and amplitude of the feeding network, a horizonal radiation beam that parallel with the ground plane was obtained. This design shows great potential for the directional and...
In diversity and MIMO applications, techniques for changing radiation patterns are required because the propagation path of a radio wave can be changed according to the time and space. In this paper, we propose a novel pattern reconfigurable antenna array with switching function of uni- and bi-directional radiation patterns. In the proposed antenna, pattern shapes and directions can be changed by...
This paper presents simulation and experimental investigation results of steerable integrated lens antennas (ILAs) operating in the 60 GHz frequency band. The feed array of the ILAs is comprised by four switched aperture coupled microstrip antenna (ACMA) elements that allows steering between four different antenna main beam directions in one plane. The dielectric lenses of the designed ILAs are extended...
Cognitive radio applications require reconfigurable RF air interfaces. We present here the design of a reconfigurable decoupling and matching network (DMN) for a cognitive multi-band antenna array. The antenna array operates at three selected frequencies of GSM900, GSM1800 and IEEE 802.11b/g. The role of the DMN is to define radiation patterns at the input ports, decouple array elements, and improve...
In this paper, the detailed antenna configuration as well as the feeding network design is presented in Section II. The antenna performance for linear polarization is shown in Section III, while the performance for circular polarization is given in Section IV. A novel polarization reconfigurable array antenna is proposed and fabricated. Measured results validate the performance improvement in port...
In this paper, a method of stagger tuned resonant frequency shift is proposed for improving the bandwidth of planar switched parasitic array antenna. By setting the active and parasitic elements of different sizes, and adjusting the feeding location on active element and loading positions on parasitic elements respectively, the bandwidth of this antenna is improved. The simulated results show that...
In this paper, a single-feed switchable feed network that combines two port of a micro-strip antenna with a quarter wavelength feed-line, is presented. The principle operation of a switchable feed network is based on the assumption that a quarter wavelength feed-line is terminated with a micro-strip antenna. The proposed switchable feed network can be designed with a multiple odd numbers of a quarter...
A simple scheme for spatially multiplexing two BPSK signals using a switched antenna system with a single RF chain, a shared RF-DC cable and a shared RF-DC feeding circuit is proposed. The idea is to modulate the first BPSK substream to one of the two array elements while exciting the second element parasitically by the field of the first one. The second substream is encoded in such a way to control...
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.