Design of a Rectangular Patch Antenna Using Computer Simulation Technology (Cst)

An RFID tag, as shown in Figure 3.2, consists of an integrated circuit attached to an antenna that has been printed, etched, stamped or vapor-deposited onto a mount which is often a paper substrate or PolyEthylene Therephtalate (PET). The chip and antenna combo, called an inlay, is then sandwiched between a printed label and its adhesive backing or inserted into a more durable structure.

2. Radius; increasing the radius will increase the inductance value and the Q of the device; somehow it will resonate at high frequency.

This antenna is designed on FR-4 substrate. It has dielectric constant 4.4 and thickness 1.6 mm. copper material is used for ground plane and patch. We provided microstrip line feeding to this antenna.

The slot is fed by microstrip line because it is easy to etch on the substrate and to seek impedance

0 Use the Internet to research one to two applications of the illustrated wireless technology. List each application found. Be sure to reference the Web site(s) where you found this information.

permittivity of the water saturated sand is between 10 and 30 whereas the LNAPL saturated

In my project, I have designed and simulated microstrip patch antenna at operating frequency 2.4GHz using HFSS software .It has Substrate (FR4) having dielectric constants of 4.4.I have designed single patch antenna without DGS, 2x1 array antenna and 4x1 array antenna without DGS ,4x1 array antenna with DGS (Dumbbell shaped , Double Circular shaped, E-shaped) and analyze the results. I analyze that I god improved results in 4x1 array antenna configuration with E-shaped DGS structure in terms of Voltage Standing Wave Ratio of 1.12, Return loss of -22.12 dB, Bandwidth of 404 MHz, Gain of 7 dB etc.

planar substrate is molded to define the setae. In this initial condition, the setae are positioned in the plane of

Window embedded wire antennas have been introduced at FM frequencies for low-power or receive-only applications. The power transmitted by the army radios at VHF and UHF frequencies can exceed tens of watts. At these power levels, it is of crucial importance to isolate the interior of the vehicle from the antenna radiation. In addition, this isolation eliminates the affects of the cabin interior and passengers on the antenna input impedance and radiation pattern. Hence a transparent ground plane will be needed behind the radiating element to reduce the radiation inside the vehicle and at the same time increase the directivity of the antenna. A wire-mesh or a more sophisticated band-selective ground plane can be used as the reflecting element. A meshed patch antenna on a mesh ground plane can provide the required isolation with the cabin interior. However because of the sub-wavelength dimensions of the armored windows at VHF and UHF frequencies a patch antenna, if feasible, cannot provide the one octave bandwidth required by the army radios. In this paper a monopole bow-tie antenna backed by a cavity (armored window) is proposed. Because of the limited thickness of the window glass, the radiation element and the transparent ground plane need to be placed very close to each other. Therefore the gain and/or the

In order to operate in the fundamental 10 TM mode, the length of the patch must be slightly less than λ / 2 where λ is the wavelength in the dielectric medium and is equal to λ0 / ε ff where λ is the free space wavelength. The 10 TM modes implies that the field varies one

As shown from table.1, if the resonator gap between two parallel couple microstrips transmission lines is small then the

Lockheed Martin (LM) conducted a thorough review of all the test data on the CD Band Antenna and conclude that Cobham (CAS) has met all the Qualification Test criteria for the CD Band Antenna. Cobham also completed their 2nd Cd Band antenna. The Supplier Quality Engineer (SQE) and the Technical Subcontract Manager (TSM) were on-site to help facilitate the final processes step and to drive the units out the door. Also shipped this week was (1026-5) Low Band antenna. The current forecast is still tracking to have 3 additional CD Band completed before the end of the month.

on a thin, ground-plane-backed dielectric substrate. The device is designed to anomalously reflect an incident wave 69

The graph of return loss vs. frequency is shown in figure 2.2. The example antenna is resonating at 3.3333 GHz. From the curve, it can be seen that the proposed circular microstrip antenna design is giving good return loss of -22.885dB at 3.3333 GHz.

operation but also needs to have an appropriate proposed design. It employs two techniques to improve the radiation pattern. These techniques are the use of an angled dipole and vertical copper plates arranged on the ground plane for improvement in the radiation pattern of lower and upper bands, respectively radiation profile in both bands, namely similar gain, wide beamwidth. One of the popular techniques for broadening the patch antenna bandwidth is to incorporate a U-slot on its surface. They have the ability to confine the power in certain directions instead of scattering the power everywhere.