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.
Herein, design and experimental results of a dual band Microstrip Monopole antenna are presented. The proposed antenna consists of a zig-zag microstrip line as monopole patch alongside of a Defected Ground structure under the fed-line of the antenna for size miniaturization propose, fabricated on FR4. The 10-dB bandwidth and gain performances are measured as 130 MHz and 6 dB at the centre frequency...
UWB Pentagon antenna is designed to detect brain stroke and brain tumour. It is operating at a band from 3.3568– 12.604 GHz in free space and from 3.818 to 9.16 GHz on the normal head model. The antenna has dimensions of 44×30mm2. It is fabricated on FR4-substrate with relative permittivity 4.4 and thickness 1.5mm. The antenna is simulated on the CST Microwave Studio and measured using the network...
In this paper, design and experimental results of a coplanar stripline fed Microstrip Yagi-Uda antenna are presented. The proposed antenna consists of a microstrip line to coplanar stripline transition, reflector microstrip patch, coplanar stripline-fed driver dipole, and three director microstrip patches on low-cost FR4 with the relative permittivity 4.4, thickness 1.58mm, loss tangent 0.025. The...
This paper presents a compact dehydration measurement method, keeping in mind a system integration in a wristwatch housing. In contrast to the conventional measurement approach using two measurement antennas, the proposed measurement setup uses only one antenna and one metallic reflector. Measurements have been performed using a patch antenna immersed in a steel basin filled with a tissue-equivalent...
Experimental and theoretical investigations of the influence of substrate thickness on the performance of Si field effect transistor terahertz detectors are presented‥ We show that in the case of planar metal antennas a significant portion of incoming radiation, instead of being coupled to the transistors, may be coupled to the substrate leading to important responsivity losses‥ The ways of avoiding...
Although we have evaluated the characteristics of the FM receiver by repeated running tests. Thus, there have been issues in its reproducibility and objectivity. To solve this problem, we developed a Two-Stage method reproducing a virtual radio environment on a PC [1]. However the Two-Stage method also had problems in estimating the actual radio wave environment and the arrival of FM broadcast wave...
In the paper, planar slot loop antennas are presented. The antennas radiate electromagnetic waves which are polarized perpendicularly to a conductive surface. Therefore, the antennas can be used for on-body or off-body communication. The role of the substrate is played by a three-dimensional textile material. Conductive parts of antennas are fabricated by a screen-printing technology using a silver...
Using terahertz waves for imaging is gaining increased interest. A CMOS cascode amplifier biased near the threshold voltage of a MOSFET for terahertz direct detection is proposed. A test chip composed of 4×4 pixel CMOS terahertz imaging array is designed and fabricated on the basis of a low-cost 180-nm CMOS process technology. Each pixel consists of a microstrip patch antenna, an impedance-matching...
This paper presents the challenge involved in designing LTCC leaky wave antenna operated in mm-wave band. Taking account a possibility of using LTCC technology in the mm wave, some advantages and limitations of its technology in these frequency band are described. Moreover the transition between waveguide to designed antenna is presented and the simulation results of each parts of the structure are...
In this paper a novel 61GHz radar sensor node for industrial positioning and distance measurement is presented. The sensor provides numerous functions enabling a broad range of signal processing technologies and is designed with regard to cost-efficient implementation only using commercial available components without limiting the area of possible applications. Beside the requirement analysis and...
A novel planar end-fire circularly polarized (CP) complementary antenna is presented. It consists of an aperture element as the magnetic dipole and a printed dipole element as the electric dipole. Due to the combination of the vertically polarized component from a magnetic dipole and the horizontally polarized component from a printed dipole on the same substrate, a planar CP antenna with end-fire...
In this paper the cylindrical antenna array consisting of eight double ridged horn antennas is presented. The array was designed to work as a sumator of microwave power gathered from synchronized sources. The main requirements to obtain are omnidirectional pattern in azimuth and wide coverage in elevation plane. The described simplified design approach allowed to meet these requirements what is necessary...
An experimental verification of a novel method for sidelobe level (SLL) reduction designated for multi-beam antenna arrays is presented. In this method non-uniform amplitude taper excitation is obtained with the use of additional two-way power dividers introduced at the outputs of the utilized Butler matrix. This paper presents array factor calculations, electromagnetic simulations and measurements...
The paper reports permittivity and loss tangent measurements of LTCC materials in 90–140 GHz frequency band. The measurement technique is based on transmission through the dielectric sample in free space conditions. Both permittivity and loss tangent are determined as a function of frequency.
The paper describe antenna polygon reconstruction, that is focused to new equipment for L-band measurement system. New measuring instrument was used for remote access. Reflector antenna with two electronically selected orthogonal antenna planes was realized, measured and installed at tower.
A dual-polarised probe is discussed for planar near-field (NF) antenna measurements with a background. The probe has a low cross-polarisation. Analysis has been revisited recently, results of which are presented. Computational power allows to use Method of Moments (MoM) tools. Bodies of revolution can be handled by a tool like CHAMP. A 3-dimensional MoM analysis has been carried out with the tool...
In this paper, a polarization reconfigurable U-slot half-mode substrate integrated waveguide (HMSIW) antenna with left handed circular polarization (LHCP) and linear polarization (LP) is proposed. Switching between LHCP and LP is carried out by shorting the slot. The antenna is designed for the operating frequency of 10 GHz, fabricated and experimentally verified. Experimental results proves that...
This paper presents two ways to reduce the mutual coupling between the resonators of the RFID chipless tags. This reduction significantly improves the uniformity of the RCS response of the tag over the operational frequency range from 2 to 4 GHz. The first modification to the tag layout is based on an inter-element rearrangement of the array elements. The second layout modification is based on narrowing...
An electronically switched beam antenna for localization of passive UHF RFID tags based on a simple Angle of Arrival (AoA) technique is proposed‥ Detailed antenna design and realization are presented together with corresponding simulations and measurement results. Experimental tests with passive UHF RFID tag show the validity of theoretical assumptions for application of the antenna in UHF RFID based...
Antennas are a key element in the wireless communication world of today, however, the significant disadvantage of microstrip antennas is its low bandwidth. In this work a microstrip planar antenna with enhanced bandwidth has been discussed. This antenna can be treated as an Ultra Wide Band (UWB) microstrip antenna due to the obtained frequency range of 12.9 GHz. The enhancement derives mainly from...
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.