Passive Front End for LTE TDD Transceiver

Abstract

In this paper, a passive front end for a 3GPP Long Term Evolution (LTE) TDD transceiver comprising a microstrip antenna and filter is presented. The proposed antenna and filter operates in the LTE band 36 (TDD) which extends from 1930MHz to 1990MHz. A patch antenna and Hairpin filter is fabricated with a total area of 43x36mm 2 for the antenna and 38.6x32.16mm 2 for the filter. The proposed devices are fabricated using FR-4 material substrate and the measuring results show good agreement with the simulation results. The fabricated antenna has 2.67dBi directivity, 1.242dB gain, a minimum return loss of -31.85dB at resonant frequency 1950MHz and 150.3 MHz bandwidth at 6dB return loss, while the filter has -3dB BW of 90MHZ, a center frequency of 1950MHz and a fractional bandwidth of 4.615%.

Constructing Complete Radio Frequency Receiver for LTE TDD Transceiver

“…From the measurements, the -3dB BW of the filter amounts to 90 MHZ and a center frequency of 1950MHz. It is clear from the figure that there is a satisfactory agreement between the simulated and measured results [8].…”

“…Micro-strip technics are used for the passive part (the antenna and the band pass filter). The detailed description passive front end is given in [8] 3.1 LTE Antenna Design The antenna is then fabricated and its photographs are shown in Figure 3…”

“…The filter is designed and simulated using the CST simulator program Figure 5 (a) and (b) shows Filter design Top view and the photograph of its fabrication. The dimensions are given in Table 2 [8]. The simulated performance of the filter is shown in Figure 6.…”

Perancangan Broadband RF Power Amplifier 2,3 GHz pada 4G LTE Time Division Duplex

“…Teknologi 4G LTE memiliki dua cara pengantaran yang dikenal dengan istilah Frequency Division Duplexing (FDD) dan Time Division Duplexing (TDD). TDD menggunakan satu frekuensi untuk uplink dan downlink, hanya dengan pemisahan jeda waktu yang singkat [1].…”