The Investigation On Data Card Antenna For HSDPA Application

HSDPA (HIGH SPEED DOWNLINK PACKAGE ACCESS) which is an data service based on grouping, it comes from the 3G network of WCDMA standard. The most trait of HSDPA is promoting the rate of using the network, comparing to the WCDMA of the 3G network which has already used global at present.The pioneer terminal products of HSDPA are data card, for HSDPA focus on the application of data. It combines the data card and PC, data operation and voice operation, mobile communication and internet perfectly. It can use the SIM card to connect the internet in any place where covered by the radiophone signal. Good performance and high value make the HSDPA terminal products be the hotspot that people pay attention widely.The frequency source is becoming more and more strain in the recent years, because the mobile communication developed rapidly in the word wide, and the number of the consumer is growing. The system should have the performance of multi frequency and wide bandwidth, in order to meet the number of user growing, so the multi frequency of HSDPA terminal products will be the hotspot.The main work of this paper is to analysis and design the data card of HSDPA. The antennas designed in the paper are all five-frequency, based on the general request for the data card of the companies produce the HSDPA terminal products. It is designed the single antenna and diversity antenna, and the diversity antenna is divided two parts including master antenna and slave antenna, the master antenna is also five-frequency, and the slave antenna is worked on the received frequency. The signal antenna is analyzed and computed using FDTD, get the S₁₁ parameter and direction chart, then simulate and optimize with HFSS, finally we fabricate the practicality. We analyze and design the diversity antenna based on the single antenna. We improved on the structure considering the isolation, then fabricate and test the two groups of antennas. The result shows that the antennas designed in the paper are fit for the data card of HSDPA.