A new navigational signal designated as L5 with a center frequency of 1176 MHz and a bandwidth of 20 MHz has been introduced as part of GPS Modernization. This new signal is in the Aeronautical Radio Navigation Service Band and will primarily benefit aviation users by allowing precision navigation when used with the existing L1 signal for ionospheric corrections. In addition, U.S. military user...

In this paper a microstrip transmission line fed compact monopole antenna for the wide-band (2. 5 GHz 11 GHz) communication system is designed and its performance is verified. In particular, we have simulated four types of wideband monopole antennas: rectangular, modified rectangular, circular and modified circular disk monopole antennas. Simple rectangular microstrip lines are used for feeding...

The dual band equilateral triangular microstrip antennas are realized by cutting the slots of either quarter wave or half wave in length, inside the patch. In this design, however these simpler approximations of slot length against the frequency do not give closer results for different slot lengths and there positions inside the patch. In this paper, the modal variations of slot cut patch anten...

Micro strip patch antennas are widely used in compact, conformal and lowcost wireless applications due to its advantages over conventional antenna. Literature study of last few decades of micro strip patch antenna (MPA) shows that the different techniques are used to design a small size micro strip patch antenna. In this paper survey is conducted on different antenna designing methods like E sh...

Some new focusing properties of time-domain ultra wide band (UWB) focusing array antennas are presented. The large current radiator (LCR) is considered as the UWB antenna element. Each LCR is replaced by a set of infinitesimal dipoles modeling both the near field and the far field patterns of the antenna element, as well as the coupling between the elements. Several antenna arrays with differen...

An efficient wide-band analysis that combines modified integral equation-physical optics (IE-PO) hybrid formulation with the best uniform approximation is proposed for antennas around an electrically large platform in this paper. The modified single-level Fast Fourier Transform (FFT) algorithm which is based on the subdomain FFT acceleration is employed by interpolating the Green’s function and...

In this paper, the modal theory of antennas is re-visited, believing that it brings invaluable information towards facilitating the design of multi-feed multi-band antennas. First, some subtle changes are proposed to enhance the applicability of the theory. Next, using some efficient computational techniques, the proposed formulations are shown to predict, to a very high accuracy, the input imp...

The need for development of microstrip patch antennas for ultra-wideband (UWB) communications has been very well recognized.UWB antennas are mainly used for wearable MIMO sytems,weather mesurements and also UWB radar applications. Patch antenna can be a good choice for handheld devices in UWB applications.There was a great success in finding a suitable structure for mobile applications.This pap...

The compact multi band antennas are the demand of the new evolving technology. A triple band antenna for which two bands, are in C-band having bandwidths 134MHz and 87.5MHz. The center frequency for first band of bandwidth 134 MHz is 5.37GHz and for second band of bandwidth 87.5MHz is 5.88GHz. The third band lies in the frequency range of X-band having bandwidth 673MHz with center frequency 11....

A compact dual-band dual-polarized antenna is proposed in this paper. The two pair dipoles with strong end coupling are used for the lower frequency band, and cross-placed patch dipoles are used for the upper frequency band. The ends of the dipoles for lower frequency band are bent to increase the coupling between adjacent dipoles, which can benefit the compactness and bandwidth of the antenna....