Technical Background
With the development of 4G/5G mobile communication technology, especially after entering the 5G communication era, the network speed of mobile Internet has been greatly improved, and it is the choice for more terminals to access the network. Antenna is an important part of terminal products, responsible for signal transmission and reception, so the performance of antenna's bandwidth, radiation efficiency, gain and direction map directly affects the communication quality of terminal products. As a common external antenna, rubber stick antenna has been widely recognized in the market for its excellent omnidirectionality, excellent gain, low price and convenient installation. However, as people's communication needs for communication efficiency, coverage and user experience continue to improve, it also brings a series of technical challenges to the antenna industry. VLG has developed a technical solution to meet the shortcomings in this field.
Technical overview
Problems of the currently commonly used full-band omnidirectional communication antennas:
① Low efficiency gain at low frequency, which can not meet the needs of customers;
② Directional map in the high-frequency band, affecting the quality of communication.
The 4G/5G omni-directional glue stick antenna technology solution developed by VLG is aimed at solving the problems of low efficiency gain at low frequency and directional map cleavage at high frequency of existing antennas.
1. In order to improve the efficiency and gain of low frequency, a low frequency choke slot is added to the PCB board to reduce the current suppression on the coaxial line, which makes the energy radiated out, and the low frequency gain is increased by 1.5dB on average;
2. The antenna belongs to ultra-wideband antenna, through the gradient structure and impedance matching, it makes the VSWR below 1.6 in the frequency bands of 820-960MHz, 1710-2690MHz, 3300-3600MHz;
3. The ideal gain of traditional symmetric oscillator antenna is 2.15dBi, and it is a narrowband antenna, this antenna adopts inexpensive FR4 plate and a single panel can realize the broadband gain above 2dBi, which reduces the cost and improves the performance of the antenna.
Example of effect
Example of effect
Referring to Fig. 1, the voltage VSWR curve of omnidirectional glue stick antenna, in the frequency band (820MHZ, 960MHZ, 1.71GHZ, 2.13GHZ, 2.32GHZ, 2.655GHZ, 2.4GHZ, 3.6GHZ) the VSWR is basically below 1.6, however, indoor this kind of antenna is routinely required to be below 2, so that the said omnidirectional glue stick antenna's VSWR reaches the design requirements.
Referring to FIGS. 2 and 3, a 2D directional schematic of the described omnidirectional glue stick antenna at 820 MHZ-960 MHZ and 1700 MHZ-2700 MHZ is shown, with the antenna directional pattern being a regular figure of eight radiation at 820-2690 MHz.
Referring to FIG. 4, the 2D direction schematic of the described omnidirectional glue stick antenna at 3400 MHZ-3600 MHZ, at 3300-3600 MHz, the 2D direction graph is somewhat upwardly curved, but there is no undesirable occurrence of cleavage.
Referring to FIG. 5, the gain of said omnidirectional glue stick antenna maintains a gain of 2 dbi in the 820 MHZ-2600 MHZ band, the gain of said omnidirectional glue stick antenna rises from 2 dbi to 4 dbi in the 2600 MHZ-3460 MHZ band, and the gain of said omnidirectional glue stick antenna maintains a gain of 3.5 dbi in the 3460 MHZ-3600 MHZ band above. The efficiency of the antenna in the full frequency band is basically about 70%, and the efficiency of the conventional omnidirectional antenna in the low frequency is 40%, and the gain is 0.5dBi, and the antenna's gain in the full frequency band is above 2dBi.
Referring to FIG. 6, a graph comparing the gain of the omnidirectional glue stick antenna described with the addition of a low frequency slot, the addition of the low frequency choke module 200 significantly improves the gain of the antenna in the frequency band of 820 MHZ-960 MHZ.
Referring to FIG. 7, a comparison of the gain of the omni-directional glue stick antenna described with the addition of an IF slot, the addition of the IF choke module 300 significantly improves the gain of the antenna in the frequency band of 1700 MHZ-2700 MHZ.
As can be seen from the above, this scheme solves the problems of low efficiency gain of existing antennas at low frequencies and the occurrence of cleavage of the directional map at high frequencies, and achieves the technical effect of providing high gain and full coverage in the 4G and 5G frequency bands.
Application Areas
This glue stick antenna is a very broadband antenna that is used in a variety of scenarios due to its wide frequency coverage, moderate size, and ease of installation.
Applications include, but are not limited to, security monitoring, unmanned cabinets, and various types of industrial routers and gateways. It is worth noting that specific applications also need to consider the actual performance parameters of the antenna, such as gain, polarization, impedance matching and other factors, as well as the frequency use regulations of the region, VLG for different fields, different scenarios applications are equipped with solution advantages.
This glue stick antenna is a very broadband antenna that is used in a variety of scenarios due to its wide frequency coverage, moderate size, and ease of installation.
Applications include, but are not limited to, security monitoring, unmanned cabinets, and various types of industrial routers and gateways. It is worth noting that specific applications also need to consider the actual performance parameters of the antenna, such as gain, polarization, impedance matching and other factors, as well as the frequency use regulations of the region, VLG for different fields, different scenarios applications are equipped with solution advantages.
