This paper presents a multiband CPW-fed slot antenna with L-slot bowtie tuning stub. The proposed antenna has been designed for PCS 1900, UMTS, WLAN 802.11 a/b/g and bluetooth applications, with a cost-effective FR4 substrate. The proposed antenna still radiate as omni-directional in azimuth plane and sufficient bandwidth for all above mentions. The proposed antenna works as dual-wideband, band...

antenna structures with low side lobe levels are normally the main goal during antenna design. in this paper, a new method for reduction of radiation pattern side lobe level in phased array antenna with uniform and non-uniform weighting is presented. in this method, by changing the array elements weight or adding several elements, such as slc technique, the pattern with low side lobe level can ...

This paper presents the design of a wideband 16 4 element array of a microstrip-proximity-fed rectangular-slot antenna for marine radar systems operating in the X-band. A wideband corporatefeed network is designed to feed the proposed array. The new design has a small size, a wide bandwidth of 52%, and good radiation characteristics in the entire operating band. © 2005 Wiley Periodicals, Inc. M...

Presence of Foreign object debris (FOD) at airport runways is an immense threat to flight safety. Such objects may cause potential damage to the aircraft especially during the take off and landing. This paper introduces the design of a low-cost Ka-band FOD radar sensor adopting state-of-the-art system-on-substrate (SoS) approach. Contrary to the reported single-layer SoS design approach, multi-...

Hollow-waveguide slot array antennas [1] have been widely used in the milli-meter band since they do have neither radiation loss nor dielectric loss. Furthermore, they have been developed especially for military application such as radars. For commercial application such as fixed wires access system, mass production at low cost has been required and single layer hollow-waveguide slot array ante...

Combination of interstitial hyperthermia and radiation brachytherapy has been shown to be effective for treatment of a tumor. After increasing the temperature, the tumor becomes sensitive to radiation dose, and as a result the radiation dose can be reduced. The purpose of this study was to identify the appropriate invasive antenna array which can be effectively used on a deep-seated breast tumo...

In this paper, we propose a small switched-beam antenna for mobile terminal. This kind of antenna is a single compact slot antenna fed by microstrip line. This proposed antenna provides three different radiation patterns. The antenna is designed to cover 3G Universal Mobile Telecommunication Systems (UMTS; 1.922.17 GHz). Its advantage is small of size and easy to manufacture. The performance of...

Abstract—In this paper, a single layer 4× 4 U-slot patch antenna array based on differential feed was developed to achieve a wide bandwidth and low cross polarization with a simple feed network. A U-slot was cut on a radiation patch to realize a wideband performance, and a microstrip-line fed structure was adopted to make the patch and feed network placed in a single layer. In order to reduce e...

A compact microstrip-fed antenna with dual notched bands is proposed. First, a simple basic configuration is presented for Ultra Wide Band (UWB) applications and then the dual band notched structure is extended from the UWB one. The basic structure of the UWB antenna consists of a simple square radiating patch and a ground plane with a wide square slot on back of the substrate. A semi-circle sh...

In this paper, a novel arrangement for dual-band millimeter-wave and infrared focal plane array based on slot-antennacoupled metal-oxide-metal diodes is demonstrated. The receiving properties for millimeter-wave and infrared antenna-coupled detector pixels are presented. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 78–80, 2005; Published online in Wiley InterScience (www.inters...