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| spe - 12 - 8 - 0 19 /a/zl page 1 of 11 specification part no. : ti.08.a.0111 product name : 868 mhz ism band dipole terminal antenna feature : sm a plug( m ) c onnector high radiation efficiency and robust handling rohs c ompliant
spe - 12 - 8 - 0 19 /a/zl page 2 of 11 i. introduction the ti.08.0a.0111 is high performance 868mhz ism band dipole omni - d irectional antenna. the antenna features an sma(m) connector as standard, the antenna has a high radiation efficiency o f 35% in free space . the a ntenna is fab ricated using tpu which allows for robust handling , while remaining lightweight ii. specification electrical centre frequency 868 ~ 870 mhz peak gain - 1.7 dbi average gain - 4 .4dbi radiation efficiency 35 % vswr 1.5 : 1 max polarization linear impedance 50 ? mechanical dimensions 168 x 12 mm housing material tpu connector sma (ma) weight 21g environmental operation tempera ture - 4 0c to 8 5 c storage temperature - 40c to 105 c relative humidity 40% to 95% * electrical properties are measured with the antenna in free space . spe - 12 - 8 - 0 19 /a/zl page 3 of 11 iii. ant enna free space s11 performance return loss vswr -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 780 800 820 840 860 880 900 920 940 960 (mhz) (db) 1 2 3 4 5 6 7 8 780 800 820 840 860 880 900 920 940 960 (mhz) spe - 12 - 8 - 0 19 /a/zl page 4 of 11 iv. antenna free space radiation property iv.1. radiation efficiency iv.2. peak gain 0 5 10 15 20 25 30 35 40 45 50 55 60 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 frequency (mhz) efficiency (%) -10 -8 -6 -4 -2 0 2 4 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 frequency (mhz) gain (dbi) spe - 12 - 8 - 0 19 /a/zl page 5 of 11 iv.3. average gain -16 -14 -12 -10 -8 -6 -4 -2 0 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 frequency (mhz) gain (dbi) spe - 12 - 8 - 0 19 /a/zl page 6 of 11 iv.4. 868mhz free space radiation pattern h - plane radiation e - plane radiation (dbi) -40 -35 -30 -25 -20 -15 -10 -5 0 5 0 30 60 90 120 150 180 210 240 270 300 330 (dbi) -40 -35 -30 -25 -20 -15 -10 -5 0 5 0 30 60 90 120 150 180 210 240 270 300 330 spe - 12 - 8 - 0 19 /a/zl page 7 of 11 v. ground plane effect three ground se tups are used to see the affect of positioning ti.08 close to ground - 1. small ground (15 x 9cm) C common size of cpe devices. ti.08 is mounted at the longer edge for testing. 2. big ground edge (45 x 30cm) C simulate the effect of mounting antenna on a base s tation device. ti.08 is mounted at the centre of the longer edge. 3. big ground centre (45 x 30cm) C simulate the effect of mounting antenna in a centre of a big ground plane, such as vehicle top. s11 performance of ti.08 with different ground return loss -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 780 800 820 840 860 880 900 920 940 960 (mhz) (db) stand alone small gnd big gnd edge big gnd centre spe - 12 - 8 - 0 19 /a/zl page 8 of 11 vswr vi. radiation property of ti.08 with different ground vi.1. radiation efficiency 1 2 3 4 5 6 7 8 780 800 820 840 860 880 900 920 940 960 (mhz) stand alone small gnd big gnd edge big gnd centre 0 5 10 15 20 25 30 35 40 45 50 55 60 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 frequency (mhz) efficiency (%) stand alone small gnd big gnd edge big gnd center spe - 12 - 8 - 0 19 /a/zl page 9 of 11 vi.2. antenna peak gain vi.3. average gain -10 -8 -6 -4 -2 0 2 4 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 frequency (mhz) gain (dbi) stand alone small gnd big gnd edge big gnd center -16 -14 -12 -10 -8 -6 -4 -2 0 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 frequency (mhz) gain (dbi) stand alone small gnd big gnd edge big gnd center spe - 12 - 8 - 0 19 /a/zl page 10 of 11 vi.4. radiation pattern h - plane radiation e - plane radiation (dbi) -40 -35 -30 -25 -20 -15 -10 -5 0 5 0 30 60 90 120 150 180 210 240 270 300 330 stand alone small gnd big gnd edge big gnd center (dbi) -40 -35 -30 -25 -20 -15 -10 -5 0 5 0 30 60 90 120 150 180 210 240 270 300 330 stand alone small gnd big gnd edge big gnd center spe - 12 - 8 - 0 19 /a/zl page 11 of 11 vii. mechanical drawing u nit : mm |
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