r8 antenna

In general, our common antenna tests in engineering practice are divided into the following types: Near-Field Test In the near-field antenna test, the distance from the test probe to the plane of the tested antenna port is about 3 λ 5 λ. In this case, the antenna test is near-field test.The near-field

With the popularization of 3G technology and the development of wireless standards and technologies such as LTE, NFC, Bluetooth 4.0, cmms B, and MIMO, mobile Terminals need to integrate multi-band main antennas (supporting 2g, 3G, LTE and other multi-standard), as well as GPS, BT, WiFi, NFC, wireless charging and other antennas. As a result, terminal antenna engineers are facing huge challenges: Antenna siz

The antenna theory of the experts is simple: http://www.52rd.com/bbs/Detail_RD.BBS_187060_42_1_3.html The problem must be analyzed in essence. The above two images can be used for analysis. Antenna evolution can be analyzed by transmission lines. The transmission lines are represented by the same axis. The same axis is divided into core, insulation layer, and shielding network. When the complete Coa

Reference: 1. wikipedia The dipole antenna is the simplest and most widely used class of antenna. It consists of identical conductive elements such as metal wires or rods, which is usually bilaterally symmetrical. Each side of the feedline to the transmitter or receiver was connected to one of the conductors. Dipoles is resonant antennas, meaning that the elements serve as resonators, with standing waves

Smart antenna is a kind of bidirectional antenna installed in the base station, which obtains directivity through a set of fixed antenna units with programmable electronic phase relation, and simultaneously obtains the directional characteristic of each link between the base station and the mobile station. The principle of the smart

The antennas are clear to everyone. We used to build antennas on the roof to receive TV signals. However, with the development of the times, we have seldom seen strange TV antennas, instead of Various wireless antennas. What is a wireless antenna? Of course it is an antenna related to wireless signals. What is a wireless antenna? Before answering this question, l

In the previous article, we introduced what is a wireless antenna and the two basic parameters of the antenna. Next we will introduce in detail what are the outdoor wireless antennas. We have already introduced indoor wireless antennas. We will not repeat them here. Outdoor wireless antenna 1. Omnidirectional Antenna A

An antenna (antenna) is a transducer that transforms a traveling wave propagating on a transmission line into an electromagnetic wave propagating in a unbounded medium (usually a free space), or in reverse. A component used in radio equipment to transmit or receive electromagnetic waves. Radio communications, radio, television, radar, navigation, electronic confrontation, remote sensing, radio astronomy and

With the development of global 4G networks in full swing in recent years, how to simplify the deployment of remote adjustment antennas and improve their reliability has become a new concern of operators for the antenna feed system. Due to its inherent requirements for on-site access, low operation and maintenance efficiency, and affected antenna radiation performance, the method of mechanical tilting optimi

First of all, a misunderstanding is: the more the antenna coverage, the more the antenna signal stronger MIMO (Multiple-entry) is the technology of multiple antennas is from the 802.11N protocol only after the 802.11a,b,g have not. That is to say, the first generation of routers (802.11n ago) will never have more than one antenna. And you bought a new 3-day line

Source: Length calculation method of single whip antennaWhen doing radio frequency transmission, the choice and length of the antenna has a great influence on the reception sensitivity of the signal, the following is a brief overview of the antenna calculation:Alternating currents in a piece of metal wire can be emitted to the space to alternately change the induced electric field and the induced magnetic f

http://poj.org/problem?id=3020Antenna Placement Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7565 Accepted: 3758 DescriptionThe Global aerial Centre have been allotted the task of building the fifth generation of mobile phone nets in swed En. The most striking reason so they got the job, is their discovery of a new, highly noise resistant, antenna. It's called 4DAir, and com

Antenna Placement Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7011 Accepted: 3478 DescriptionThe Global aerial Centre have been allotted the task of building the fifth generation of mobile phone nets in swed En. The most striking reason so they got the job, is their discovery of a new, highly noise resistant, antenna. It's called

This question is to find at least how many launch devices need to be built, and the obvious binary match. However, the undirected graph is created, so it will be doubled in coverage, in fact, some points are repeated, so we need to output the total number-half of the matching points of the record ,, Antenna placement Time limit:1000 ms Memory limit:65536 K Total submissions:5576 Accepted:2793 DescriptionThe global

Antenna placement Time limit:1000 ms Memory limit:65536 K Total submissions:6334 Accepted:3125 DescriptionThe global aerial research centre has been allotted the task of building the maximum th generation of mobile phone nets in Sweden. the most striking reason why they got the job, is their discovery of a new, highly noise resistant, antenna. it is called 4 dair, and

Work frequency 1GHz, new project, add new design, edit add the following variablesAn antenna model is established, which is two metal cylinders. After editing a oscillator, the other half can use the image command to create the parameters as follows, the material is PECA rectangular sheet is formed between two cylinders, connecting two cylinders to feed the power.The excitation method for setting the rectangular face is the lumped port excitation. Fro

Click to open the link topic linkAntenna Placement Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7386 Accepted: 3651 DescriptionThe Global aerial Centre have been allotted the task of building the fifth generation of mobile phone nets in swed En. The most striking reason so they got the job, is their discovery of a new, highly noise resistant, antenna. It's called 4DAir, and

Antenna Placement Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 6991 Accepted: 3466 DescriptionThe Global aerial Centre have been allotted the task of building the fifth generation of mobile phone nets in swed En. The most striking reason so they got the job, is their discovery of a new, highly noise resistant, antenna. It's called

CST dipole antenna simulation, half-wave dipole antenna One. In this paper, a 2013-version of a dipole antenna with a CST simulation frequency of 1GHz is used. The simulation steps are 1. Select an antenna engineering template for CST 2. Set the default units 3. Materials for setting the background (air chamber, etc.)

LTE user documentation(if there are inappropriate places, please correct me!) )9 PHY Error ModelThe physical error model consists of a data error model and a downlink control error model, both of which are activated by default. You can use the Ns-3 property system to activate, specifically:Config::setdefault ("ns3::ltespectrumphy::ctrlerrormodelenabled", Booleanvalue ( False)); Config::setdefault ("ns3::ltespectrumphy::D ataerrormodelenabled", Booleanvalue ( false));Ten MIMO Modelin this sectio