6.1. Conclusion and Summary
Here, we will summarize the conclusions of these two LTE frequency band antenna. The first one is the CPW feed dual band antenna and the frequency band at the lower frequency from 640MHz to 960MHz and at the higher frequency form 2150MHz to 2920MHz, fully support the LTE specification below 1GHz and the range between 2300MHz to 2690MHz..At the frequency below 1GHz, it can provide the applications such as SMH blocks A/B/C/D ,Cellular 850, UMTS 800, UMTS850, GSM, UMTS 900, EGSM900 and EU’s Digital Dividend 800MHz. At the frequency range between 2300MHz to 2690MHz, it can provide additional application like IMT- E and IMT 2000. The radiation pattern at lower frequency is the monopole pattern , the peak gain at 775 MHz is greater than -10 dB . At 2550MHz, the peak value is about 1.3dB.
Then, the second one is the microstrip line feed triple band antenna and the frequency band at the lower frequency from 610MHz to 930MHz, the middle frequency band form 1830MHz to 2150MHz and the higher frequency band from 2280MHz to 2780MHz., support part of LTE specification below 1GHz, the range between 1710MHz to2170MHz and the range between 2300MHz to 2690MHz. Providing the additional applications are IMT2100, PCS 1900 and DCS 1800, at the middle frequency band. The radiation pattern at lower frequency is the monopole pattern. the peak gain at 762MHz still greater than -10 dB , At 2000MHz and 2475MHz , the peak gain value are 0.5dB and 1.5dB, respectively.
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6.2. Future Study
In the future, there still have some topics we can research. These two antennas don't cover all the frequency band of the LTE , still left the frequency band 1420MHz to 1660MHz and 3400MHz to 3800MHz and the peak gain value at the higher frequency could be greater than the proposed antenna.
For the second one, it may be a challenging and promising topic to find the equivalent circuit model of the proposed notch path structure.
In the after time, the proposed antenna design can be a good candidate for LTE system.
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