نتایج جستجو برای: microstrip discontinuity

تعداد نتایج: 15155  

2011
Ali W. Azim Shahid A. Khan Zeeshan Qamar K. S. Alimgeer S. M. Ali

This paper presents a novel way for achieving endfire radiation pattern using microstrip patch antenna array. The extensively used microstrip patch antennas i.e. rectangular and circular microstrip patch antennas, either single patch or in an array configuration do not have an endfire radiation pattern. The antenna array presented in this paper is designed by changing the geometry of the antenn...

2010
Kenneth S. K. Yeo Michael J. Lancaster

The development of microstrip filters has been in great demand due to the rapid growth of wireless communication systems in this decade. Quasi-elliptic response filters are very popular in communication systems because of their high selectivity, which is introduced by a pair of transmission zeros. A number of ways of implementing the quasi-elliptic response filter on microstrip have been studie...

2010
Atsushi Kunita Kunio Sakakibara Kazuyuki Seo Nobuyoshi Kikuma Hiroshi Hirayama

Millimeter-wave antennas have been developed for various applications such as broadband high-speed wireless communication systems and automotive radar systems. Microstrip antennas are more advantageous than other millimeter-wave antennas at the viewpoints of low profile and low cost [1]. On the other hand, transmission loss of microstrip line is significant problem in array feeding. So, microst...

2009
T. F. Lai Wan Nor Liza Mahadi Norhayati Soin

This paper present a circular patch microstrip array antenna operate in KU-band (10.9GHz – 17.25GHz). The proposed circular patch array antenna will be in light weight, flexible, slim and compact unit compare with current antenna used in KU-band. The paper also presents the detail steps of designing the circular patch microstrip array antenna. An Advance Design System (ADS) software is used to ...

2008
Christophe Risacher

This paper presents a new model to calculate the characteristic impedance and wave propagation constant of a microstrip line made of a superconducting material. Modelling provides the only tool for designing superconducting microstrip based circuits because no direct measurements of such a line can be made at millimetre and sub-millimetre waves and at cryogenic temperature of 4 K with required ...

2014
Shivani Gupta Saket Kumar Jaegeun Ha Kyeol Kwon Youngki Lee Jaehoon Choi Anubhuti Khare Rajesh Nema Puran Gour

Generally microstrip patch antenna (MPA) is used in modern communication devices and day-to-day communication is done through it. Study of literature of past few year shows that, the leading work on MPA is design compact size broadband microstrip antenna, but inherently MPA have narrow bandwidth so various techniques are engaged to enhance bandwidth. This review paper demonstrates some commonly...

2008
S. H. Zainud-Deen M. E. Badr E. El-Deen K. H. Awadalla H. A. Sharshar

A proposed sensor for landmines detection consists of two parallel microstrip antennas placed on the same ground plane and with defected ground structure between them has been investigated. The microstrip patch array with defected ground structure has the advantage of a low mutual coupling compared with the classic one. The Finite-Difference Time-Domain (FDTD) is used to simulate the sensor for...

2012
Ashish Singh

In this paper, compact notch loaded microstrip antenna is analyzed using Zeland IE3D simulator and circuit theory concept. Analysis on varying thickness, dielectric constant, length and width of the notch has been reported. The bandwidth obtained by the proposed antenna is about 41.8%. Key WordsWide band, Microstrip Patch Antenna, Return Loss, Dielectric Substrate.

2012
Gurdeep Singh Jaget Singh

The microstrip antenna finds applications in varied and upcoming technologies because it offers low profile, narrow bandwidth, high gain, and compact antenna element. The microstrip antenna have biggest disadvantage of narrow bandwidth and poor impedance matching. To make microstrip antenna compatible with commercial applications, the bandwidth enhancement and impedance matching of such antenna...

2005
Mohammad T. Kawser Luiz A. Silva Amir I. Zaghloul

Microstrip antennas are low in profile and light in weight and they are now developed for many applications. The main difficulty of the microstrip antenna is its narrow bandwidth. Several modern applications like satellite communications, remote sensing and multi-function radar systems will find it useful if there is a dual band antenna operating from a single aperture. Some applications requir...

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