Radio frequency antenna types

First let start by saying what is the (LRAD) The Long Range Acoustic Device? Is a loud microphone or speaker to convey important message to loud noise making indidvuals and the environment. It is not a less lethal weapon. The LRAD get the attention of a crowd or a criminal is about to break the law by disturbing the peach, the LRAD will get the attention of the trouble maker, prevent injury, and save lives. What is it used for; LRAD is mostly used in crowded situation which will include a lot of…

extremely useful for police, firefighters, military personnel and large courier businesses. The location data can be stored within the tracking unit and transmitted to a central location data base or internet connected computer, using a GPRS or SMS, radio or satellite modem embedded in the unit. By this location to be displayed against a map backdrop either in real time or when analyzing the track later, using GPS tracking software. This device available for smartphones and other mobile devices.…

2nd Argument (Medics) From a medical perspective, microchip implants could save countless lives. In the news, we hear a number of stories everyday about death due to allergic reaction, mental illness and even wandering elderly freezing out in the cold. If one device, the microchip implant, could prevent or even simply diminish the number of these deaths from occurring, why not have them mandated? The ideal microchip implant would keep a record of each person’s medical history on their…

Radio Frequency Identification (RFID) Radio-Frequency Identification (RFID) is a wireless technology that uses radio waves to read and capture information stored on a tag. A RFID reader can read the tag from upto several feet away. However unlike barcode, it does not need to be within direct line-of-sight of the reader to be scanned. There are two different type of tags: one is passive tag which collects energy from a nearby RFID reader 's radio waves; and another one is active tag that has a…

EMV Contactless Specifications This chapter provides a description of the EMV contactless protocol. Section 3.1 describes the different documents the describe the EMV Contactless specifications. Section 3.2 describes the contactless interface of EMV Contactless cards. Section 3.3 gives a high level overview of the EMV Contactless transactions. Finally, 3.4 gives a complete description of the Mastercard PayPass specifications. 3.1 EMV Contactless Specification Documents The EMV Contactless…

The innovation of the RFID chip or the Radio Frequency Identification has been a critical piece of technology that has been around since the 1950’s.. There are several methods of identification, but the most common is to store a serial number that identifies a person or object, and perhaps other information, on a microchip known as identity chip. A microchip implant could be used as a virtual barricade, to limit movement, and even to act as a tag for prisoners. In the realm of medicine, it could…

held to the ear during a call. They are also used in the machine vibration monitoring to measures the variation in distance between the shaft and its support bearing. This is common in the large steam turbine, compressor, and motor that use sleeve type bearing. 5.2 Inductive Proximity Sensor A proximity ( inductive ) sensors is an electronic proximity sensors which detects metallic object without touching them. The sensor consist of the an induction loop. Electric current generate a magnetic…

In the first place let begin by saying what is the (LRAD)? It is The Long Range Acoustic Device. Which is a loud megaphone/microphone or speaker to convey important messages to individuals who makes loud noise and disturb the environment. Certainly, the LRAD is not a less lethal weapon. Of course, the LRAD is used to get the attention of a large crowd or a criminal is about to break the law by disturbing the peace. The LRAD once in operation will get the attention of the troublemaker, prevent…

like: supermarket items(known as the barcode), inside people, pets, computers, phones, etc. to track them down, read their data and transfer files to and from. An RFID tag is a Radio frequency identification device(Tag You're It 72). It contains radio frequency which means anyone with an RFID tag reader can receive radio waves and see whatever the RFID tag contains. Even Though RFID’s track kids and pets that ran away from home, they should not be used because they are dangerous to personal…

empirical mathematical formulation for the characterization of radio wave propagation as a function of frequency, distance and other conditions. • These models predict the path loss (i.e. the reduction in power density of an electromagnetic wave as it propagates through space or underground) of a transmitter and also the effective coverage area of transmitter. We know that when a signal travels from a wireless channel, it undergoes various types of Propagation Effects like – Reflection,…