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HiVHF+UHF RL-M2 2-Bay+Loop - NO Refl.
Hi-VHF+UHF 2-Bay Bowtie (RL-M2, No Reflector) plus Hi-VHF Rectangular Loop Resonator analyzed using 4nec2.
Adding Hi-VHF Resonator Loop reduced Hi-VHF SWR to ACCEPTABLE level, plus somewhat higher Gain.

For comparison, WITHOUT the Loop, M2 (10.0x9.5) 2-Bay Bowtie (NO Reflector) provides UHF Gain
of 5.7 to 9.7 dBi with SWR Under 3.2 and Hi-VHF Gain of 2.0 to 2.5 dBi, but SWR = 13-7 is EXCESSIVE.

Two versions were analyzed (ALL using AWG10 Wire Size):

a) mclapp M2 (9.5x9.0) 2-Bay plus Rectangular Loop, with Loop in the same plane and always OUTSIDE the 2-Bay.

UHF Raw Gain = 5.7 to 9.3 dBi [DECREASE of 0.0 to 0.4 dB] and SWR (300-ohms) Under 2.8 [EXCELLENT].
Hi-VHF Raw Gain = 3.4 to 3.5 dBi [INCREASE of 1.4 to 1.0 dB] and SWR (300-ohms) Under 4.0 [FAIR]
[Versus 13 to 7 without Loop].

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b) mclapp M2 (10.0x9.5) sized 2-Bay plus Rectangular Loop, with Loop Offset 0.5-in from 2-Bay to prevent overlap collisions.

UHF Raw Gain = 4.9 to 9.3 to 9.2 dBi FORWARD [DECREASE of 0.8 to 0.4 dB] and Raw Gain = 5.0 to 8.7 to 8.4 dBi TO REAR
with SWR (300-ohms) under 3.1 [GOOD].
Hi-VHF Raw Gain = 3.8 dBi [INCREASE of 1.8 to 1.3 dB] with SWR (300-ohms) under 2.6 [EXCELLENT].
Date(s): 27 Jan 2015. Album by holl_ands. 1 - 39 of 39 Total. 3602 Visits.
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
3D View


Enlarge photo 2
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
Front View - 2-Bay & Loop in SAME Plane
Loop is about 21.0-in H x 21.0-in W
Feedline Separation is 1.5-in
Tine Separation is 5.0-in
[1 large square = 2.5 inches]


Enlarge Microsoft Word Document 3
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DOC3
M2 (9.5x9.0) 2-Bay + Rectangular Loop
4nec2 File includes Dimensions


Enlarge photo 4
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4
M2 (9.5x9.0) 2-Bay + Rectangular Loop
UHF Raw Gain = 5.7 to 9.3 dBi
[INCREASE of 0.4 to 0.3 dB]


Enlarge photo 5
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5
M2 (9.5x9.0) 2-Bay + Rectangular Loop
UHF SWR (300-ohms) Under 2.8
[REDUCTION of 0.1]


Enlarge photo 6
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6
M2 (9.5x9.0) 2-Bay + Rectangular Loop
UHF Impedance


Enlarge photo 7
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 470 MHz


Enlarge photo 8
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 530 MHz


Enlarge photo 9
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9
M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 590 MHz


Enlarge photo 10
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10
M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 650 MHz


Enlarge photo 11
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11
M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 698 MHz


Enlarge photo 12
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 806 MHz


Enlarge photo 13
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
Hi-VHF Raw Gain = 3.4 to 3.5 dBi
[INCREASE of 1.2 to 1.0 dB]


Enlarge photo 14
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14
M2 (9.5x9.0) 2-Bay + Rectangular Loop
Hi-VHF SWR (300-ohms) Under 4.0
[Versus 13 to 7 without Loop]


Enlarge photo 15
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15
M2 (9.5x9.0) 2-Bay + Rectangular Loop
Hi-VHF Impedance


Enlarge photo 16
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16
M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 174 MHz


Enlarge photo 17
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 198 MHz


Enlarge photo 18
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M2 (9.5x9.0) 2-Bay + Rectangular Loop
Azimuthal Pattern at 216 MHz


Enlarge photo 19
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19
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
3D View


Enlarge photo 20
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20
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Front View - 0.5-in Between 2-Bay & Loop
Loop is about 21.75-in H x 20.0-in W
Feedline Separation is 1.5-in
Tine Separation is 5.0-in
[1 large square = 2.5 inches]


Enlarge photo 21
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21
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Top View
[1 large square = 2.5 inches]


Enlarge photo 22
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22
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
UHF Raw Gain = 4.9 to 9.3 to 9.2 dBi FORWARD


Enlarge photo 23
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23
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
UHF Raw Gain = 5.0 to 8.7 to 8.4 dBi TO REAR
UHF F/B & F/R Up to 0.8 dB
due to Offset=0.5-in


Enlarge photo 24
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M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
UHF SWR (300-ohms) Under 3.1


Enlarge photo 25
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25
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
UHF Impedance


Enlarge photo 26
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26
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 470 MHz


Enlarge photo 27
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27
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 530 MHz


Enlarge photo 28
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28
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 590 MHz


Enlarge photo 29
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29
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 650 MHz


Enlarge photo 30
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30
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 698 MHz


Enlarge photo 31
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31
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 806 MHz


Enlarge Microsoft Word Document 32
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DOC32
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
4nec2 File


Enlarge photo 33
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33
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Side View
[1 large square = 2.5 inches]


Enlarge photo 34
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34
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Hi-VHF Raw Gain = 3.8 dBi
Hi-VHF F/B & F/R Ratio = 0.2 dB


Enlarge photo 35
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35
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Hi-VHF SWR (300-ohms) Under 2.6


Enlarge photo 36
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36
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Hi-VHF Impedance


Enlarge photo 37
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37
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 174 MHz


Enlarge photo 38
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38
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 198 MHz


Enlarge photo 39
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39
M2 (10.0x9.5) 2-Bay + Rect. Loop Offset=0.5-in
Azimuthal Pattern at 216 MHz


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