SU1660086A1 - Microstrip antenna - Google Patents

Description

The invention relates to antenna technology. The purpose of the invention is the expansion of the bandwidth of the workstations. The micro-strip antenna (MPA) contains a radiating element made in the form of a disk 1 and located on one side of the dielectric substrate 2, on the other side of which there is a metal screen (ME) 3, a rectangular metal plate (PMP) 4 equidistant in the plane of symmetry of the MPA. and coaxial feeder 5. In order to expand the range

operating frequencies and ensuring the possibility of tuning the resonant frequency of the MPA in disk 1, a slot is made consisting of at least three straight sections, and between disk 1 and ME 3 there are ρ - ί - n-diodes 10. the first ends of which are connected to disk 1, and the second - to the block of the formation of code combinations. The inner conductor of the coaxial feeder 5 by means of a whip excitation probe 9 is connected to the disk 1. And the outer conductor is connected to the MEZ. The block of the formation of code combinations, controlling the operation of p - ϊ - p-diodes 10, determines the resonant frequency of the MPA. In the proposed MPA operating frequency range expanded by 15-20 times compared with the prototype, its use in communication systems increases their noise immunity, since in each time interval it has a narrow frequency band. 2 Il.

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1660086

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The invention relates to antenna technology and can be used as an independent directional antenna or antenna array element.

The purpose of the invention is the expansion of the operating frequency band.

Figure 1 shows the structural diagram of the microstrip antenna (MPA), top view; figure 2 - section aa in figure 1.

The MPA contains a radiating element made in the form of a disk 1 and located on one side of the dielectric substrate 2, on the other side of which is placed a metal screen (ME) 3, a rectangular metal plate (PMP) 4 and a coaxial feeder 5. Disk 1 is made with a radius a equal to a ⁼ Aomin / 2 π Fe / (where Aomin is the minimum working wavelength in free space; ε _Γ is the relative dielectric constant of the dielectric substrate 2). PMP 4 is located in the plane of symmetry of the MPA, while its lower and upper edges are connected respectively to disk 1 and ME 3, the edges of one of its side edges to the edges of disk 1 and ME 3. The length of MMM 4 is equal to (0.6

- 0.8) a. In disk 1, a slot 6 is made, consisting of at least three straight sections intersecting at the center of symmetry of disk 1. One of sections 7 of slot 6 is located along the upper edge of the MMM 4 and its length is a, and the remaining sections 8

- made with a length (0.2 - 0.5) a, counting from the center of symmetry of the disk 1. The inner conductor of the coaxial feeder 5 is connected to diode 1 by a pin excitation probe 9, while the pin excitation probe 9 is located at a distance (0.8 - 1,0) and from the center of symmetry of the disk 1 in the range of angles' 10-120 °, / measured from the plane of the PMP 4, and the outer conductor to the MEZ. Between disk 1 and ME 3, p - ί - p-diodes 10 are located, the first ends of which are connected to the edges of the slit 6 and / or to that half of the disk 1 to which the pin excitation probe 9 is connected, and the second ends to the corresponding outputs of the forming unit control code combinations.

MPA works as follows.

Using probe 9 in the resonator formed by disk 1 and ME 3, an electromagnetic field is excited, the structure of which, and, consequently, the resonant frequency of the MPA, is determined by the boundary conditions near the edges of the disk 1. In order to effectively change the specified boundary conditions to enable the working frequency to the maximum possible extent while maintaining a non-directional amplitude NF in the horizontal plane and providing a level of agreement on the traveling wave coefficient of IPM> 0.5 for all changes in the boundary wave In the disk 1, slot 6 was cut out, p - I - diodes 10 were entered, the corresponding length of the PMP 4 and the connection point of the probe 9 were selected. The control code generation unit controls the operation of p - I - p diodes 10, opening and closing them. A set of control voltages applied to the second inputs of the p-I-p-diodes 10 constitutes a code combination that determines the resonant frequency of the MPA. The length of the code combination is equal to the number of p - ί - n-diodes 10, and the number of permutations in the code combination - the number of resonant frequencies to which the MPA can be tuned. The resonant frequencies are chosen to ensure uniform filling of the entire specified range of operating frequencies and the best agreement. The number of sections 8 of the slit 6 and the number of p - ϊ n-diodes 10 depends on the number of resonant frequencies. The proposed MPA provides an extension of the operating frequency range by 15 to 20 times compared to the prototype, and its use in communication systems increases their immunity to interference. Since it has a narrow operating frequency band at each particular time interval.

Claims (1)

A microstrip antenna containing a dielectric substrate, on one side of which is a radiating element made in the form of a disk, and on the other is a metal screen, a rectangular metal plate located in the plane of symmetry of the microstrip antenna, while its lower and upper edges are connected respectively to the disk and the metal screen, and the edges of one of its side edges - to the edges of the disk and the metal screen, and a coaxial feeder, the inner conductor of which through the pin Vågå excitation probe is connected to the disc, and the external conductor - the metal screen, characterized in that. in order to expand the operating frequency band, the disk is made with a radius a equal to a = Aomin / 24 L Fe /, where Aomin is the minimum working wavelength in free space; e _g - relative dielectric constant of the dielectric substrate, the disk is made five 1660086 6 a slit consisting of at least three rectangular sections intersecting at the center of symmetry of the disk, with one of the straight sections located along the upper edge of the rectangular metal plate and its length is equal to a, and the rest are made of length (0.2 - 0.5) a counting from the center of symmetry of the disk, and p - I η-diodes are placed between the disk and the metal screen, with their first ends connected to the edges of the slot and / or to the half of the disk to which pin excitation probe, and the second ends through holes made in a metal screen, are connected to the corresponding outputs of the inserted block 5 forming control code combinations, with the length of a rectangular metal plate being (0.6–0.8) a, the whip excitation probe is located at a distance (0.8– 0.1) and from the center of symmetry of the disk in the range of angles 10–120 ° , ί '(measured from the plane of a rectangular metal plate. Aa