Miniaturized Balanced Antenna with Integrated Balun for Practical LTE Applications

Abstract

Abstract. A design of dual-band balanced antenna struc-

A broadband and low cross polarization antenna with a balun of microstrip line coupling to slot line

“…Comparing to the balun achieved by microstrip gradient line [ 1 – 4 ], the Antenna using the balun proposed in this paper can lower the height and achieve an improved low cross-polarization performance. Comparing to the balun used in [ 9 ][ 10 ], the balun used in this paper is simpler and can obtain a wider impedance bandwidth.…”

“…This method of feeding can achieve a wider impedance bandwidth on the one hand and can guarantee the symmetry of the radiation pattern on the other hand. There are also some articles adopt the phase-shifting network to achieve the purpose of balanced differentially feed [ 9 ] [ 10 ]. But the length of the transmission line due to the 180 ° phase shift will vary with frequency, so this kind of feeder network is very difficult to achieve a wide bandwidth.…”

On the multi‐resonant antennas: Theory, history, and new development

“…As the second example, a series of multi‐resonant antennas in various mobile communication and broadcasting systems is raised and introduced. Multi‐resonant antennas packaged within different mobile terminals have been developed. As seen, even though the antenna is packaged within an all‐metal handset with critical space limitation, multi‐resonant loop‐dipole antenna with external lumped matching network can exhibit usable performance to cover the existing wireless communication bands from 800‐2700 MHz, that is, GSM850/900, DSC1800, PCS1900, UMT2100, TD‐SCDMA, and TD‐LTE bands .…”

Dual-Band MIMO Balanced Antenna for C-Band and WLAN Applications

“…These kind of antennas are based on symmetric feed structures with two wires having exactly the same current and being 180 degrees out of phase. Several balanced antennas have been recently reported [10][11][12][13][14][15], but these are still using a single radiating element in both the transmitter and receiver side, and consequently are limited in the amount of data throughout and reliability that they can offer to cater for a truly broadband experience that next generation handsets should offer. Until recently, very few MIMO balanced antennas have been demonstrated [16][17].…”