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A compact log periodic antenna (LPDA) is presented in this paper. In this paper, a slotted second iteration of LPDA is demonstrated for size reduction that used for UHF digital TV band application. The proposed antenna operates from 0.5GHz to 1.5GHz for the reflection coefficient ≤ −10dB and maintain the gain of more than 5dBi. The antenna is designed on FR4 Epoxy dielectric substrate with the thickness...
In today's life, compact antennas are required for wireless communication systems so that they are capable for operating at different frequencies. Space filling and self-similarity property of fractal antennas makes them one of the most useful antennas and they are also know for there multiband properties and size reduction characteristics. The recent study shows that fractal antenna structures have...
In modern wireless communication system, antennas having low profile structure with wider bandwidth has become the most trending class of antennas. One proposed method of fulfilling the aforementioned requirements is via the use of a fractal geometry, giving rise to fractal antenna. This paper presents novel metamaterial based fractal antenna. FR4 is used as metamaterial layer. The results of return...
A bowtie slot on-chip antenna (OCA), exhibiting multiband operation at 94 and 140 GHz is presented. The first of its kind on-chip multiband operation is achieved by adding parasitic loading elements in the slots. The bond-pads along with a shunt-stub, form the impedance matching network of the antenna. Designed in IHP 130nm BiCMOS process, the simulated gain of the proposed antenna is −4.09dBi and...
A dipole antenna using Sierpiński carpet fractal with step impedance operates at 4.3GHz. Based on Sierpinski Carpet fractal and step impedance theory, it can suppress harmonics frequency. The proposed antenna is constructed on brass, include reflector and dipole. Its size of this antenna is 97.75 67.56 mm including reflector. This small size antenna is more compact to install in the aircraft instruments...
The work scheme of this paper represents the new design of a dual-band coplanar waveguide feed (CPW) antenna with a concept of fractal and coplanar to provide dual-band and Omni-directional radiation. Each Verre de Champagne fractal geometry response an individual frequency by the larger shape operates at lower frequency whereas the smaller shape operates at RF altimeter frequency band. This type...
Due to the growth in wireless communication; the user demand for multiband, low cost, high gain, wideband and electrically small size antenna is increasing day by day. The above demands can be fulfilled by the use of Fractal geometry Antennas. In this survey, we have made the comparison of different fractal geometry antennas and techniques used for UWB applications and also observed about obtaining...
In this paper, multiband Bow Tie antenna with the circular arm is proposed with two circular slots of radius 13 mm in the ground plane. By applying the Apollonian Gasket of fractal geometry on the circular arm of Bow Tie this antenna is resonating at four frequencies, 3.57, 5.79, 6.99 and 8.38 GHz with reflection coefficient values of −19.42 dB, −52.97 dB, −29.93 dB and −26.92 dB respectively. With...
A compact fractal antenna which is both frequency and polarization reconfigurable is presented in this paper. The proposed paper presents a Minkowski fractal microstrip antenna loaded with slots operating at a frequency of 1.7GHz. Frequency and polarization re-configurability is achieved by introducing four slots on the fractal shaped patch with PIN didoes as switches across them. By varying the ON...
The proposed antenna was configured by cutting slots in the radiator plate of the initiator antenna, the shapes of the slots repeated in different locations to generate quad operating bands that cover the frequency ranges (4.4–6.1)GHz,(8.4–10.9)GHz,(13.1–13.7)GHz and (18.2–19)GHz. The investigation of the surface current matched the results of the radiation patterns and axial ratio band width to prove...
In the present paper, a novel coplanar wiveguide (CPW)-fed printed fractal-shaped slot antenna for bandwidth enhancement is presented. The proposed antenna is composed of a wide fractal-shaped slot and an hexagonal parasitic patch fed by a CPW Feed. The combination of the fractal concept and CPW-fed technique allows to improve the characteristics of the proposed antenna significantly. The simulation...
A reconfigurable fractal-shaped slot-ring antenna with wide bandwidth is presented. The antenna is able to switch between two modes using 8 PIN diode switches. In the first mode, the proposed antenna operates at S band with 70% fractional bandwidth (FBW). In the second mode of operation, the antenna covers C band with 67% FBW. Fractal shapes are incorporated into the antenna structure to significantly...
In this paper, multiband Bow Tie antenna with the circular arm is proposed with two circular slots of radius 13 mm in the ground plane. By applying the Apollonian Gasket of fractal geometry on the circular arm of Bow Tie this antenna is resonating at four frequencies, 3.57, 5.79, 6.99 and 8.38 GHz with reflection coefficient values of −19.42 dB, −52.97 dB, −29.93 dB and −26.92 dB respectively. With...
A mm-wave circularly polarized (CP) fractal antenna has been designed and simulated using standard 0.18 urn CMOS with six metal-layer structure. The proposed design consists of a wideband circularly polarized multi-segment circular fractal antenna with circular polarization at the top layer M6. The proposed CFA has a small size of 25×25× 1mm3 and operates over the frequency band between 49.8- and...
Nowadays, our living environment is rich in radio-frequency energy suitable for harvesting. This energy can be used for supplying low-power consumption devices. In this paper, we analyze a new type of a Koch-like antenna which was designed for energy harvesting specifically. The designed antenna covers two different frequency bands (GSM 900 and Wi-Fi). Functionality of the antenna is verified by simulations...
A T-shaped Folded type of antenna is basically a multiple band antenna which is widely used in wireless communication. Here it is presented three frequency bands of 6 GHz and 8.5 GHz 10.8 GHz. T shaped antenna can efficiently extended the current distribution of proposed antenna, the dimension of antenna is significantly designed and more resonant frequency in the required frequency range are obtained...
A modified fractal antenna for bandwidth enhancement is proposed in this paper. The proposed antenna has stair-slots on the ground plane and cross square fractal element as radiating element. The overall size of the proposed antenna measures 31.35 mm × 18.7 mm × 1.6 mm. The proposed fractal UWB antenna is simulated using CST Microwave Studio. The antenna has broad impedance bandwidth of 8.1 GHz from...
This paper presents some initial observations on the application of fractal shaped slots in a substrate integrated waveguide based leaky wave antenna. Significant to the design issues are obtaining a nearly 1 GHz impedance bandwidth with a second iteration fractal shaped slot ranging from 9.25 GHz to 10.25 GHz. Pattern stability is observed with near identical radiation pattern within the frequency...
This paper proposed a compact Log Periodic Fractal Koch Antenna (LPFKA) by utilizing slots for Ultra High Frequency (UHF) Television White Space Spectrum (TVWS) bands applications. This log periodic antenna is comprised of ten radiating elements with titled slot angles and placed on both sides of the substrate in crisscross arrangement. This antenna was designed at frequency between 0.47 GHz and 0...
This paper, investigates a compact single band notched Ultrawideband (UWB) monopole antenna with a modified Hilbert Fractal Parasitic Resonator. The antenna exhibits an Ultra Wide bandwidth which ranges from 2.61GHz–13.22GHz. The parasitic resonator results in band notching the frequency range between 7.89–8.83 GHz which is assigned for X-band satellite communication systems. This antenna can be used...
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