Broadband inversed F type antenna

Abstract

This invention provides a broadband reverse F type antenna, including an antenna body installed at a circuit board, a short line and a feed-in line; wherein the antenna body is composed of a first part, a second part and a third part; the line width of the first part is shorter than that of the third part; and the second part is installed between the first and third parts, and the line width of the second part is gradually increased from one end to the other end; and the short line is installed at the position between the first part and one grounding surface set by the circuit board and adjacent to one end of the first end and; the feed-in line is installed at the position between the first part and the grounding surface and adjacent to the other end of the first part. Therefore, the effective bandwidth of the broadband reverse F type antenna is easy to be adjusted to cover the needed broadband of the product using the broadband reverse F type antenna because of no any metal between the antenna body and the grounding surface, and the tolerance is effectively increased when mass-production is carried out.

Description

technical field [0001] The invention relates to an inverted-F antenna, in particular to a wide-band inverted-F antenna that effectively expands the bandwidth, is easy to adjust to a required frequency band, and effectively increases tolerance during mass production. Background technique [0002] At present, network equipment manufacturers add the function of antenna selection (Antenna Diversity) to wireless network equipment such as wireless network access point (Wireless Access Point) or wireless router (Wireless Router), so that the wireless network equipment can have the best signal transmission and reception quality, Finally, the goal of full signal coverage and no dead ends is achieved. Therefore, in addition to the antenna exposed on the casing of the current wireless network device, another antenna is provided inside the casing. The other antenna is mostly a chip antenna (Chip Antenna), a printed circuit monopole (Monopole) antenna, an inverted-F antenna, and the lik...

AI Technical Summary

Problems solved by technology

Please refer to Fig. 4, the feed-in line and the short-circuit line have a width of 0.85 mm and a length of 5 mm, and the distance between them is 2.3 mm. The antenna body 144 has a width of 0.7 mm and a length of 18.63 mm. Please refer to As shown in Fig. 5, after circuit design verification and measurement, the bandwidth between the return loss -10dB is between 2.338 and 2.508GHz, and the inverted-F antenna 14 generally has the problem of insufficient bandwidth.

[0010] According to the above, the common shortcomings of the above antennas 10, 12, and 14 are that the bandwidth performance is not ideal, which makes the coupling error vector magnitude (EVM) poor, which in turn affects the transmission rate (Throughput)

And due to the trend of miniaturization of wireless network equipment, coupled with institutional requirements, the placement of antennas is often limited. Therefore, it is necessary to develop antennas with broadband, miniaturization and simple shape in the current market.

Images