Racal Antennas Muldipol range of multiple dipoles is the ideal solution to the problem of the mutual interference caused when many antennas are co-sited in a restricted space, especially in complex service conditions such as air traffic control or urban police areas.

A single one-piece fibreglass housing (radome) contains up to 4 separate wideband dipole antennas in various VHF and/or UHF combinations. The antennas are arranged collinearly within the radome and operate independently of each other with a high degree of isolation, which significantly reduces the problems associated with horizontal dispersal in multi-antenna installations. Dipole elements operate over the whole of their stated frequency band with a VSWR of 2:1 or less.  The mechanical construction of the radome enables the muldipol antennas to withstand the most rugged of environments. By using a filament-wound fibreglass construction a much superior bonded strength is achieved than with conventional fibreglass cloth. The antennas are equally suited for use in a static (permanent) role or in a transportable station.  A selection of clamps are available for mounting the antenna on a variety of fixed or telescopic masts.

Some models are available with a split or folding option to halve the stowed length for ease of transportation.

General Electrical Specification (see table below for individual model specification)
VSWR	2:1 maximum
Input Impedance	50
Power Handling	100W carrier modulated 95% AM
Polarisation	Vertical
Isolation	30dB min (25dB min for D2260)
Environmental Specification	Altitude, rain, vibration, shock, salt, fog, sand and dust to MIL-STD-810. Temperature, barometric pressure and humidity to MIL-STD-210.

Model	VHF (MHz)			UHF (MHz)			Gain	No. of Outputs	HPBW (Deg)	Length (mm)	Weight (Kg)	Mount	Split Option	Folding Option
	116-150	118-136	150-174	225-400	400-470	400-500
D2118	X			XX			1.0	3	75	2902	5.67	1	Y	N
D2212	XX						1.0	2	75	3867	5.67	1	Y	N
D2212A			XX				1.0	2	75	3867	5.67	1	Y	N
D2213	X			X			1.0	2	75	2140	4.54	1	Y	N
D2214				XX			1.0	2	75	2140	4.54	1	Y	N
D2216	X						1.0	1	75	1384	2.49	2	N	N
D2217				X			1.0	1	75	819	1.81	2	N	N
D2218	XX			X			1.0	3	75	4273	7.48	1	N	Y
D2218A	XX			X			1.0	3	75	4273	7.48	1	Y	N
D2219				XXX			1.0	3	75	2901	5.90	1	N	Y
D2221				XXXX			1.0	4	75	4273	7.83	1	Y	N
D2236					XXXX		6.0	1	22	2135	8.20	1	N	N
D2260		XXX					1.0	3	75	4991	11.34	1	Y	N
D2260A			XXX				1.0	3	75	4909	11.34	1	Y	N
D2261A		XX					4.0	1	40	3568	8.62	1	Y	Y
D2261A1*		XX					4.0	1	40	3568	8.62	3	N	Y
D2262				XX			4.0	1	40	1727	5.90	2	N	Y
D2262A*				XX			4.0	1	40	1727	5.90	3	N	Y
D2263				XXXX			5.0	1	20	3406	9.07	1	Y	N
D2272*		XX					1.0	2	75	3867	7.95	3	N	Y
D2272A		XX					1.0	2	75	3867	7.71	2	N	N
D2273*		X		X			1.0	2	75	2140	5.08	3	N	Y
D2274*				XX			1.0	2	75	2140	4.95	3	N	Y
D2274A				XX			1.0	2	75	2140	4.58	2	N	Y
D2276*		X					1.0	1	75	1384	2.36	3	N	N
D2277*				X			1.0	1	75	8191	1.77	3	N	N
D2288						XXXX	1.0	4	75	2898	5.90	1	Y	N
D2295	X			XX			1.0	3	75	3175	10.43	1	Y	N
D2296	XX			X			1.0	3	75	4546	12.70	1	N	N

X indicate the number and frequency of antennas per assembly