YAGI-UDA ANTENNA Dr. Shintaro Uda and Dr. Hidetsugu Yagi of the Tohoku Imperial University invented a directional antenna system consisting of an array of coupled parallel dipoles. Yagi-uda or simply yagi antennas or yagi’s are the most high gain antennas. It consists of a driven element‚ a reflector and one or more directors. i.e.‚ yagi uda antenna is an array of a driven element and one or more parasitic elements. The driven element is a resonant half wave dipole usually of metallic rod. The
Premium Yagi antenna Antenna Antennas
to design an antenna which is capable of transmitting and receiving electromagnetic waves operating at 433MHz. Our aim is to maximize the gain of the antenna and achieve impedance matching between load impedance and transmission line’s impedance. Among a wide range of different antennas‚ our group decide to build up a Yagi Uda antenna to fulfill this assignment for two main reasons. Firstly‚ the gain that Yagi Uda antenna provides is very high. Hence for transmission‚ Yagi Uda antenna makes sure all
Premium Antenna Electromagnetic spectrum Impedance matching
The design of simulated antenna is shown in Fig. 3.1. As can be seen from the figure‚ the Yagi-Uda antenna was built on a FR4 substrate (εr = 4.4) with the thickness of 1.6 mm. The design consists of one director element‚ a driven element and a ground plane acting as a reflector. To enhance the gain of the antenna coupling microstrips and metal plate were placed‚ that focus the entire beam towards a driven dipole. Fig. 4.1: Simulated Yagi-Uda antenna 4.3 SIMULATED RESULTS After simulating
Premium Antenna Antenna Standing wave ratio
Antenna Basics Theory Basic terms Basic antenna types 1 ©Kathrein/Scholz 07/04 Antenna Basics / Theory What is an antenna ? An antenna is the converter between two kinds of electromagnetic waves : cable bounded waves ⇔ free space waves 2 ©Kathrein/Scholz 07/04 Antenna Basics / Theory antenna principle shown by bending a coax cable open the pulsing electrical field‚ created by the transmitter‘s high frequency power‚ cannot leave the cable the field lines
Premium Antenna Electromagnetic radiation Antennas
1. i) • Antenna radiation pattern or antenna pattern is defined as “a mathematical function or a graphical representation of the radiation properties of the antenna as a function of space coordinates.” • The radiation pattern is determined in the far-field region and is represented as a function of the directional coordinates. • Radiation properties include power flux density‚ radiation intensity‚ field strength‚ directivity phase or polarization [pic]
Premium Electromagnetic radiation Antenna
CHAPTER -2 SADDLE ANTENNA 2.1 NOVEL UWB ANTENNA DESIGN CONCEPT Saddle antenna is a unique kind of flared antenna. This Ultra Wide Band antenna is based on using of two smoothly shaped flares of a simple geometrical structure – the saddle. The first flare‚ larger in size‚ serves as an antenna base‚ reflector and one of the radiator arms. The second flare‚ smaller in size‚ operates as the other arm of the radiator. An apparent idea is exploited in this design that an “ideal”
Premium Electromagnetic spectrum Frequency Antenna
Antennas & Propagation CS 6710 Spring 2010 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or system of conductors o Transmission - radiates electromagnetic energy into space o Reception - collects electromagnetic energy from space In two-way communication‚ the same antenna can be used for transmission and reception Radiation Patterns Radiation pattern o Graphical representation of radiation properties of an antenna o Depicted as two-dimensional
Premium Electromagnetic radiation Rayleigh fading Fading
Antenna Characterization for Wireless Power-Transmission System Using Near-Field Coupling Wireless power transmission is the transmission of electrical energy from a power source to an electrical load without man-made conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient‚ hazardous‚ or impossible. So a study was made on the investigation of wireless power transmission by near-field coupling from the view
Premium Radio Impedance matching Antenna
NUS/ECE EE4101 Antenna Arrays 1 Introduction Antenna arrays are becoming increasingly important in wireless communications. Advantages of using antenna arrays: 1. They can provide the capability of a steerable beam (radiation direction change) as in smart antennas. 2. They can provide a high gain (array gain) by using simple antenna elements. 3. They provide a diversity gain in multipath signal reception. 4. They enable array signal processing. Hon Tat Hui 1 Antenna Arrays NUS/ECE
Premium Electromagnetic radiation Antennas Electromagnetism
Radiation pattern From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Antenna radiation patterns In the field of antenna design the term ’radiation pattern ’ most commonly refers to the directional (angular) dependence of radiation from the antenna or other source (synonyms: antenna pattern‚ far-field pattern).[1][2][3] Particularly in the fields of fiber optics‚ lasers‚ and integrated optics‚ the term radiation pattern‚ or near-field radiation pattern‚ may also be used as
Premium Antenna Reciprocity Electromagnetic radiation