CN209448012U - A kind of Millimeter Wave Phased Array Antenna device for mobile terminal - Google Patents

Abstract

The utility model discloses a millimeter-wave phased array antenna device for a mobile terminal. The device includes a double-sided printed electric dipole antenna array, a substrate-integrated waveguide double-balanced feed network and power division phase shift network. The electric dipole antenna phased array formed by the utility model has the characteristics of low profile, easy integration and wide beam coverage of the H plane, and the beam scanning characteristics of the E plane can be obtained by using different phase shift characteristics of the phase shift network to feed power , the solution of using three electric dipole antenna arrays can meet the three-dimensional space coverage requirements of the terminal equipment beyond the hemisphere, and the main space area meets dual polarization.

Description

A millimeter wave phased array antenna device for mobile terminals

technical field

The utility model belongs to a wireless communication system, in particular to a millimeter wave phased array antenna device for a mobile terminal.

Background technique

In future wireless communication systems, millimeter-wave phased array antenna technology will be widely used to achieve efficient use of space resources. As a key device in a wireless communication system, the millimeter wave phased array antenna directly determines the performance level that the system can achieve. For terminal equipment, it is even more required that the antenna used not only meet the traditional bandwidth and gain indicators, but also have the characteristics of miniaturization and wide beam coverage; in particular, if the antenna can also have end-fire radiation characteristics, then It can bring more additional benefits such as improving energy utilization and reducing interference between the antenna and the internal circuit of the device.

Due to the attenuation effect of the atmosphere on electromagnetic waves, the array antenna form with high gain characteristics is particularly favored, and is regarded as a potential antenna solution for millimeter wave communication systems. Considering the inherent narrow lobe width of the high-gain antenna array and the actual application requirements of the terminal equipment, the antenna array on the terminal equipment also needs to have reliable beam scanning characteristics.

For mobile terminal application scenarios, the omni-directional coverage capability of its signal radiation is also of great practical significance. However, the use of a single antenna or a single antenna array cannot meet the requirement of omni-directional coverage of the signal of the handheld terminal device in the entire three-dimensional space on a hemisphere. For this practical problem, the industry has not had a clear solution so far, but with the rapid development of millimeter wave communication systems, the necessity and practical significance of proposing a solution for all-round coverage of terminal equipment signal radiation is self-evident Metaphor.

Contents of the invention

Purpose of the invention: The purpose of this utility model is to provide a millimeter-wave phased array antenna device for mobile terminals to address the shortcomings of the above-mentioned prior art.

Technical solution: A millimeter-wave phased array antenna device for mobile terminals, the device is used for mobile terminals, including double-sided printed electric dipole antenna arrays, substrate-integrated waveguide feed network and power split phase shift network, the electric dipole antenna is connected through a metallized through hole, and connected to the metal frame of the mobile terminal.

Further, the number of electric dipole antenna arrays is three or more, and they are arranged on four sides of the mobile terminal, including any one of the upper side, the lower side, the left side and the right side or any two sides and both sides The above combined settings are integrated with the metal frame of the mobile terminal.

The utility model includes setting up a phased array of electric dipole antennas, and constructing a balanced feed circuit of the electric dipole antenna array through the dual balance characteristics of the substrate integrated waveguide, including a feed network and a power supply formed by the substrate integrated waveguide. The phase shifting network is divided, and the electric dipole antenna array is connected to the metal frame of the mobile terminal after being connected through metal through holes.

Further, the power division phase shifting network performs power distribution and phase shifting on the input signal, and performs phase shifting at radio frequency or local oscillator or intermediate frequency;

Furthermore, the electric dipole antenna phased array adds different phase shifts to the input signal through the phase shift network to obtain the beam scanning characteristics of the E plane.

Beneficial effects: Compared with the prior art, the utility model has remarkable effects in that: first, the antenna device provided by the utility model has an end-fire radiation pattern; Pole, so it can achieve a large bandwidth; third, it has a wider beam width on the H plane, which is easy to achieve large-angle coverage of the signal; fourth, the device uses three antenna arrays to realize the signal of the entire upper hemisphere of the terminal equipment Coverage; fourth, the beam can be scanned: the effect of beam scanning can be realized by using antenna arrays fed by different phase-shift networks; fifth, the device described in the utility model has a simple structure and is easy to process, and because it is made on a dielectric substrate , using PCB technology, so the antenna profile is low, light in weight, conducive to mass production, and easy to integrate into terminal equipment.

Description of drawings

Fig. 1 is the schematic diagram of the utility model phased array antenna;

Fig. 2 is the top plan view of a kind of design of phased array antenna of the present invention;

Fig. 3 is the bottom plan view of a kind of design of phased array antenna of the present invention;

Fig. 4 is the electric dipole antenna array in the utility model phased array antenna;

Fig. 5 is the electric dipole feeding network in the utility model phased array antenna;

Fig. 6 is the power division phase-shifting network of the first kind of phase difference design in the utility model phased array antenna;

Fig. 7 is the power division phase-shifting network of the second phase difference design in the utility model phased array antenna;

Fig. 8 is the power division phase-shifting network of the third kind of phase difference design in the utility model phased array antenna;

Fig. 9 is a scheme in which the mobile terminal utilizes the phased array antenna (three pairs) of the present invention to realize the upper hemispherical coverage of the millimeter wave communication signal;

Fig. 10 is the S-parameter test result of the phased array antenna designed based on the first power division phase-shifting network of the present invention;

Fig. 11 is the S-parameter test result of the phased array antenna designed based on the second power division phase-shifting network of the present invention;

Fig. 12 is the S-parameter test result of the phased array antenna designed based on the third power division phase-shifting network of the present invention;

Fig. 13 is the test pattern E plane and H plane result of the phased array antenna based on the first kind of power division phase shifting network design of the utility model;

Fig. 14 is the beam scanning test result of the phased array antenna E of the utility model.

Detailed ways

In order to describe the technical solution disclosed in the utility model in detail, further elaboration will be made below in conjunction with the accompanying drawings and specific embodiments.

A millimeter wave phased array antenna device for a mobile terminal. The millimeter-wave phased array for mobile terminals includes a double-sided printed electric dipole antenna array, a substrate-integrated waveguide feed network, and a power division phase-shift network; the mobile devices such as mobile phones, tablet computers, Laptop etc. Radiation of electric dipoles is formed by metal sheets printed on both sides of the substrate and connected by metallized vias. The radiation of the electric dipole is composed of four double-sided printed dipole antennas on the substrate, which are connected by metallized through holes, and have end-fire characteristics. While using the metal frame of mobile terminals such as mobile phones to improve the performance of the antenna, it solves the problem of The metal frame shields the bottleneck of millimeter wave signals.

Specifically, the substrate-integrated waveguide feeding structure is adopted, and the balanced feeding of the dipole antenna is realized by relying on the double-balanced characteristics of the substrate-integrated waveguide, and the seamless connection with the metal frame of mobile terminals such as mobile phones is solved; when using When four electric dipole antennas form an antenna phased array, the beam scanning characteristics of the E plane can be obtained by using different phase shift characteristics of the phase shift network to feed.

When this antenna array is applied to millimeter wave terminal communication, it is planned to install three antenna arrays on the upper side, left side and right side of the terminal equipment, respectively to realize the three positions of the upper, left and right sides of the terminal equipment. Directional signal coverage. With the help of the wide beam characteristics of the electric dipole antenna array pattern on its H plane, a solution to the three-dimensional space coverage requirements of the terminal equipment beyond the hemisphere can be realized, in which the main space area meets the dual polarization characteristics.

A millimeter wave phased array antenna device and implementation method for a mobile terminal disclosed in this specific embodiment, the schematic diagram is shown in FIG. 1 .

The utility model uses a design example to verify the principle, and realizes the characteristics of different phase shifts through the delay line. The top view is shown in Figure 2, and the bottom view is shown in Figure 3. All dielectric materials are Taconic TLY-5.

As shown in FIG. 4 , the radiation of the electric dipole in this example is formed by metal sheets printed on both sides of the substrate and connected through metallized via holes. The width of the double-sided metal sheet constituting the dipole is 0.6mm, the length is 2.45mm, the diameter of the metallized via hole is 0.3mm, the thickness of the medium is 0.254mm, and the gap is 0.3mm.

As shown in Figure 5, the substrate-integrated waveguide double-balanced feeding structure in this example has a length of 4mm, a width of 4.9mm, a metallized via hole diameter of 0.3mm, an interval of 0.5mm, and a dielectric thickness of 0.254mm.

As shown in Figure 6-8, in this example, different delay line networks are used to achieve different phase shift characteristics. When four electric dipole antennas are used to form an antenna array, three power division phase shift network schemes are used as an example , to verify the same amplitude and equal phase feeding and the same amplitude and different phase feeding, and then obtain the scanning characteristics of the antenna array beam.

As shown in Figure 9, when this antenna array is applied to millimeter-wave terminal communications, three antenna arrays are proposed to be installed on the upper side, left side, and right side of the terminal equipment to realize the upper, left and right sides of the terminal equipment respectively. Signal coverage in the three directions of right and left. With the help of the wide beam characteristics of the electric dipole antenna array pattern on its H plane, a solution to the three-dimensional space coverage requirements of the terminal equipment beyond the hemisphere can be realized, in which the main space area meets the dual polarization characteristics.

Figure 10-12 shows the test results of the antenna impedance bandwidth. This example covers the 24.75GHz to 28.5GHz range of the 5G frequency band and satisfies S11<-10dB.

Figure 13 shows the test results of the E-plane and H-plane radiation patterns of the electric dipole array antenna in this example when it is fed with equal phases. It can be seen that the antenna has a good large-angle coverage capability on its H-plane.

Figure 14 shows the E-plane pattern scanning test results of the millimeter-wave phased array antenna. The scanning range reaches 90 degrees, and it can be seen that it has effective beam scanning capabilities.

Claims (4)

1. a kind of Millimeter Wave Phased Array Antenna device for mobile terminal, it is characterised in that: described device is used for mobile terminal, The feeding network and power-splitting phase shift network of electrical dipole antenna battle array, substrate integration wave-guide including printed on both sides, the eelctric dipole Sub-antenna is connected by plated-through hole, and is connect with the metal outer frame of mobile terminal.

2. a kind of Millimeter Wave Phased Array Antenna device for mobile terminal according to claim 1, it is characterised in that: institute State electrical dipole antenna battle array quantity be three it is secondary and its more than, four sides of mobile terminal are set, including upside, downside, left side and Any side on right side or combination settings more than any two sides and two sides, and be integrated with the metal edge frame of mobile terminal.

3. a kind of Millimeter Wave Phased Array Antenna device for mobile terminal according to claim 1, it is characterised in that: institute It states device group and has electrical dipole antenna phased array, construct electrical dipole antenna by double equilibrium responses of substrate integration wave-guide The balanced feeding circuit of battle array, including integrating the feeding network and power-splitting phase shift network that guided wave is formed by substrate.

4. a kind of Millimeter Wave Phased Array Antenna device for mobile terminal according to claim 1, it is characterised in that: institute The power-splitting phase shift network stated carries out power distribution to input signal and completes phase offset, and carries out in radio frequency or local oscillator or intermediate frequency Phase shift.