lora antenna

The most comprehensive science. You must know about NB-IoT Want a quick and comprehensive understanding of Lora. This is enough for you to read this article. C114 News September 2 (sub-month) in the history of the development of communication industry, it has been accompanied by the competition and integration of technical standards, such as TDD and FDD, NGN and Ngi,bluetooth and ZigBee. In recent years, the development of the Internet of things in

1. Introduction The purpose of this article is to provide a guided technical overview of Lora and LoRaWAN technologies. Low-Power wide area network (Lpwan) supports the vast majority of IoT devices that are expected to be hundreds of millions of orders of magnitude. LoRaWAN optimizes the battery life, capacity, range, and overhead of Lpwan in a bottom-up manner at design time. This paper gives an overview of the LoRaWAN norms in different regions, an

In the Last Post, "LTE Physical Transmission Resources (3)-time-frequency resources," the final mention of Pcfich and other downstream physical channels, this blog post originally wanted to write Pcfich channel, but in preparation for writing Pcfich, found the need to use the antenna port related content, and these content is not yet written. So this paper first write the antenna port and downlink reference

The rapid development of the Internet of things has put forward higher requirements for wireless communication technology, and the Lpwan (Low-power wide-area Network and low Power WAN), designed for low bandwidth, low power consumption, long distance, and heavily connected IoT applications, is also booming. Nb-iot and Lora are the typical representatives and the two low power WAN communication technologies with the most development prospects. These tw

4.3.3 If a data frame contains a data payload, the frmpayload must be encrypted before the mic is calculated.The encryption mechanism is based on the algorithm referred to by IEEE 802.15.4/2006 Annex b[ieee802154], using an AES key of length 128bits.By default, the LoRaWAN layer is the data encryption/decryption for all fport. If the application layer is convenient, you can also decrypt the data in addition to FPort 0 in the upper level of the LoRaWAN layer. As for which fport to the level beyon

Lora and Sigfox such as the ISM band network in the end can survive. How to compete with NB-IoT. Lora and Sigfox, NB-IoT are Lpwan networks, Sigfox use the ISM band, their own, many are private, and operators to establish a nationwide network to do their own operators, such as China Unicom and mobile; Lora also use the ISM band, this is the practice of old Mao cr

;Data storage and processing display: mainly includes data server, Application server, monitor large screen and other parts. It is mainly responsible for storing, analyzing and displaying the data returned by the front-end collection.Program Benefits★ Realize wireless Remote meter reading function, real-time, high efficiency, accurate, low cost;★ Support multi-center, multi-level functional department of synchronous data transmission, multi-level data display, convenient, intuitive;★ Has the sys

With the rapid development of modern Wireless communication technology, Wireless Local Area network (WLAN) is widely used. WLAN uses wireless communication technology to transmit data, voice and video signals in the air, so that users can exchange information anytime, anywhere. Worldwide Interoperability for MicrowaveAccess (WiMAX) is a new broadband wireless access technology that provides high-speed internet-oriented connections, and the data transmission distance is up to 50 km. Currently, WL

Recently saw a classmate in order to enhance the mobile phone GPS signal, the antenna DIY to the outside, pulled a very long antenna, their own in the suspicion that this is in line with the principle of antenna design, can really make the signal enhancement? So find the following article to learn.1. RFID Fundamentals RFID (radio frequency identification) is a

The antenna pattern is also called the Radiation Direction map (radiation pattern), the far-field direction map (Far-field pattern). The antenna gain is not obtained from the pattern above, and the directional coefficients are obtained from the direction graph. Antenna gain = directional coefficient * antenna efficienc

1. Is the effect of placing an external antenna in the trunk of the car station worse than that in the middle of the roof?A: There are four main indicators of the vehicle's antenna: maximum withstand power, center frequency, bandwidth, and standing wave ratio.The first indicator is generally not taken into consideration, because generally, the maximum withstand power of the external

When you are using a wireless network, you are sure to experience wireless network signal quality problems. To solve these problems, in addition to reducing the shielding, reduce the interference of the same band equipment, the most effective way is to replace the high gain antenna, with the antenna to enhance the transmission effect of wireless network, coverage. However, the purchase of wireless gain

In wireless networking, we need Wireless antennas to help increase the coverage area. Especially in office buildings, we often see long, mushroom-like wireless antennas, which are used to enhance wireless signals. For wireless antenna products, let's take a look at the following introduction. For many wireless users, the deployment of every wireless lan wlan is not a simple task. The home network may be a good solution. For some enterprise networks, d

Mobile phone antennas can be divided into PIFA antennas and Single Pole antennas. As debugging becomes more difficult, a new IFA antenna is added. PIFA AntennaPIFA antenna has the same requirements on antenna height and area. Generally, the dual-band height must be above 5mm. The proposed height of PIFA antenna must b

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

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

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

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