The investigations on U-slot loaded and V-slot loaded proximity coupled microstrip antennas are reported. The performances of two antennas are investigated in frequency band of high performance wireless local area network (HIPERLAN/2) using IE3D software and the computed results are verified by measurement. Results show that the antennas have wide bandwidth and moderate gain and may be used as ...

In this paper, we have investigated printed rectangular monopole antennas, which is basically a printed microstrip antenna with etched ground plane for multi-band applications. In particular, we have fabricated and tested printed rectangular monopole antennas for dual-band and penta-band applications. It has been observed that printed rectangular monopole antennas are small in size and simple i...

This letter presents a two-port dual-band filtering network, which can be integrated with antennas for antenna applications in sub-6 GHz systems. The proposed network consists of slotline resonator and two stub groups, featuring second- third-order resonant characteristics at the lower upper frequencies. Analysis by establishing equivalent circuits is carried out to verify performance network. ...

This paper investigate some methods for converting single band antennas to multiband antennas so that all single band antennas convert in multiband antennas and gives multiband facility without increasing the cost of manufacturing. Simulation is performing on Ansoft HFSS and corresponding result are shown by figures. Impedance bandwidth, VSWR and Return loss are observed for the proposed antenn...

This paper proposed a design scheme of wide band monopulse antenna system for the passive radar seeker (PRS) of anti-radiation missile (ARM). To save the installation space of the PRS, the conical conformal log periodic antennas (LPDA) are employed to form the monopulse antenna system. The specific implementation scheme of PRS based on the conically conformal monopulse antennas was designed and...

The introduction of new generations of mobile communication systems, such as the current 3G and the future 4G, along with the provision of multimedia services, has exponentially increased the number of users demanding higher data rate. This fact has aroused the interest in studying possible solutions to improve system performance without making use of new frequency band allocations in the alrea...

We present dewar temperature and system temperature measurements for the eight cryogenically cooled receivers of a subset of four EVLA antennas that have undergone a reconfiguration to use three cryogenic compressors instead of four. We compare the changes in the system temperatures in these antennas with those obtained from a subset of eight other EVLA antennas that have not undergone such a r...

Beam-scanning antennas are attractive for high-bit-rate data communication systems and high resolution sensing systems in millimeter-wave band. Waveguide antenna is one of the most attractive antennas for such millimeter-wave systems because of its low loss and high efficiency characteristics in high frequency band. Horizontally-beam-scanning antennas such as phased arrays and DBF (Digital Beam...

This paper presents two types of dual band (2.4 and 5.8 GHz) wearable planar dipole antennas, one printed on a conventional substrate and the other on a two-dimensional metamaterial surface (Electromagnetic Bandgap (EBG) structure). The operation of both antennas is investigated and compared under different bending conditions (in E and H-planes) around human arm and leg of different radii. A du...