A dual-port double-layer planar helical slot antenna

Abstract

The invention discloses a double-port double-layer planar spiral slot antenna, and the antenna comprises an upper substrate and a lower substrate which are fixedly connected in a laminated manner, wherein a microstrip line A and a microstrip line B are arranged on the upper surface of the upper substrate; an elliptic metal ring is arranged on the lower surface of the upper substrate; an annular gap is formed at the outer side of the oval metal ring. The remaining part of the lower surface of the upper substrate is provided with a metal layer A; two spiral metal arms are arranged on the lower surface of the lower substrate; annular gaps are formed at the outer sides of the two spiral metal arms; a metal layer B is arranged at the outer side of the annular gap; the microstrip line A is located above the elliptic metal ring; and the microstrip line B is connected with one of the spiral metal arms through a metal wire. The antenna is provided with the two microstrip lines used for feeding,and the isolation degree between corresponding ports of the two microstrip lines is large, so the antenna can serve as two antennas and be used for communication modules with different frequencies, thereby reducing the size and cost of a communication system.

Description

technical field [0001] The invention belongs to the field of information communication, and in particular relates to a dual-port double-layer planar spiral slot antenna. Background technique [0002] With the rapid development of communication technology, various communication services are constantly emerging. Under the reality that communication terminals are limited in size and various data communication requirements are increasing, it is required to have multiple transmitting or receiving antennas in the communication terminal. The limited volume of the communication terminal makes it difficult to place multiple antennas. Although dual-frequency or multi-frequency antennas can be used to meet different communication needs, for example, dual-frequency or multi-frequency microstrip antennas, dual-frequency or multi-frequency planar inversion F type antenna, dual-band or multi-band monopole antenna, etc. However, most of these antennas are single-port antennas, which is not...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a dual-port double-layer planar spiral slot antenna to solve the problem that most dual-frequency or multi-frequency antennas in the prior art are single-port antennas, which are not conducive to practical use. Technical issues when transmitting or receiving data on different ports in the same communication device

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