EMC Consulting Inc. Antennas | Source of Specialized, Original Design and Custom Antennashttps://www.emcconsultingantennas.com/Wed, 17 Feb 2021 4:54:33 +0000en-us<![CDATA[Contact]]>https://www.emcconsultingantennas.com/contact/https://www.emcconsultingantennas.com/contact/Wed, 17 Feb 2021 4:54:33 +0000EMC Consulting Inc.

P.O. Box 496
Merrickville, ON.
Canada, K0G 1N0

Phone: (613) 269-4247
Email: emccons0@gmail.com

For your convenience you may also fill out the Sales / Contact Form below.

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<![CDATA[Home]]>https://www.emcconsultingantennas.com/home/https://www.emcconsultingantennas.com/home/Wed, 17 Feb 2021 7:38:13 +0000Source of Specialized, Original Design and Custom Antennas

Now Available for Purchase

30MHz to 2400MHz portable omnidirectional transmitting and receiving antenna
0.4m configuration  90MHz to 2400MHz
0.4m configuration 90MHz to 2400MHz
0.8m configuration 30MHz to 2400MHz
0.8m configuration 30MHz to 2400MHz

Price: $7500US | $9700CAN

The omnidirectional antenna is weatherproof, is easily assembled with no special tools, designed for field use and when disassembled is contained in a 25” x 20” x 8.76” waterproof case. This antenna is a vertically polarized omnidirectional antenna. It is a broadband monopole with a frequency range of 30MHz to 350MHz when set to a height of 0.8m and from 30MHz to 711MHz when set to a height of 0.4m. A bulbous antenna is mounted on top of the monopole and it has a frequency range 350MHz to 2400MHz. Thus the 0.8m monopole and bulbous antenna will cover the 30MHz to 2400MHz range. The antenna fits into a waterproof ABS case supplied with the antenna. An N type connector with a right angle adapter is mounted on the base of the unit for the 30MHz to 350MHz antenna section . An SMA connector with a right angle adapter is also mounted on the base of the antenna for the 350MHz to 2400MHz antenna section. The weight in brass (for maximum stability) is 15kg and in aluminum is 9.9kg, both with the case.

See Calibrations

View of Antenna in the Case

30MHz to 2400MHz Portable Omnidirectional Carrying Case

Specialized E and H field antennas and probes which can be customized

Specialized E and H field antennas and probes which can be customizedSpecialized E and H field antennas and probes which can be customizedSpecialized E and H field antennas and probes which can be customizedSpecialized E and H field antennas and probes which can be customizedSpecialized E and H field antennas and probes which can be customized

Measuring the susceptibility of a PBC layout, smart watch and the radiated emissions from a portable transmitter.

1) The 22.5cm x 6cm x 3cm E field antenna is designed for near field EMI measurements and is calibrated from 30MHz to 1000MHz

2) The 0.14MHz to 1MHz resonant antenna is designed for near E field measurements and for generating E fields in close proximity to the antennas. When two identical antennas are used low frequency shielding effectiveness measurements can be made. It can be custom made in almost any size equal or greater than 25.5cm x 20.5cm.

3) E and H field injection probes. These antennas are custom made and so the dimensions can be tailored to suit the dimensions of the customer’s Equipment Under Test or PCBs.

The E and H field probes are designed to generate high levels of field, to measure the susceptibility of small PCBs and ICs.

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<![CDATA[Calibrations]]>https://www.emcconsultingantennas.com/calibrations/https://www.emcconsultingantennas.com/calibrations/Wed, 17 Feb 2021 6:21:50 +00000.14MHz to 1MHz E field receiving and transmitting antenna

The antenna factor AF (AF=E/V) calibration at 1m is shown below:

0.14MHz to 1MHz E field  receiving and transmitting antenna

The power gain is shown below:

Power Gain

The radiated power Pd = Gain x Pin/ 12.56 x r

Where Pin = input power

R= distance meters

Gin = power gain

The E field is = Square root(Pd x Zw)

Zw = wave impedance = 377 x lambda/ 12.56 x r

Thus at 1m distance and 0.26MHz the wave impedance is 34633 Ohms.


Resonant H field injection probe at 13.65MHz

H field A/m input voltage (rms)
1 0.017284
5 0.08642
10 0.17284
20 0.34568
30 0.51852
40 0.69136
50 0.8642
60 1.03704
70 1.20988
80 1.38272
90 1.55556
100 1.7284
110 1.90124
120 2.07408
130 2.24692
140 2.41976
150 2.5926
160 2.76544
170 2.93828
180 3.11112
190 3.28396
200 3.4568
210 3.62964
220 3.80248
230 3.97532
240 4.14816
250 4.321

9cm x 7cm x 6mm H field resonant injection probe at 13.65MHz


10cm H field injection probe 0.1MHz to 22MHz

10cm H field injection probe 0.1MHz to 22MHz


Step up/step down transformer

Step up/step down transformer


Step up calibration

Freq (MHz) Ratio
0.01 3
0.1 3
0.2 3.2
0.3 3.2
0.4 3.4
0.5 3.2
0.9 3.2
1 3
1.3 2.8
1.4 2.8
1.5 3
1.7 2.8
2 3
8 2.8
8.5 2.7
9.5 2.7
10 3

Step Up Transformer

Step down calibration

Freq (MHz) Ratio
0.01 0.4
0.02 0.37
0.03 0.35
0.04 0.37
0.05 0.48
0.08 0.37
0.1 0.37
0.14 0.32
0.2 0.37
0.7 0.37
0.8 0.31
0.9 0.31
1.5 0.29
2 0.26
2.2 0.22
2.4 0.25
3 0.2
3.5 0.18
4 0.18
5 0.12
10 0.1

Bow tie calibration in an anechoic chamber

Bow Tie Antenna Factor at 1m


Bow tie calibration at 0.2m

Bow tie calibration at 0.2m


Ultra broadband 30MHz to 2400MHz antenna calibration

The height of the monopole section can be set to either 0.4m or 0.8m. The frequency range at 0.4m is 79MHz to 712MHz and at 0.8m 30MHz to 350MHz. The frequency range of the bulbous antenna is 350MHz to 2400MHz. Thus the total frequency range is 30-2400MHz when in the 0.8m configuration.


The power density at 20km with a 5W input power and the 0.8m configuration

Power density of 0.8m height BB monopole at 20km


The power density at 20km with a 5W input power and the 0.4m configuration of the BB monopole

0.4m height BB Monopole pd at 20km


Gain of the 0.8m configuration of the BB monopole 80MHz to 350MHz

0.8m BB Monopole Gain


Gain of the 0.4m configuration of the BB monopole 80MHz to 712MHz

0.4m Height BB Monopole Gain


Antenna factor (AF) of the 0.8m configuration of the BB monopole 30MHz to 350MHz (AF = Electric field magnitude / voltage induced into the antenna load)

Antenna Factor BB Monopole Height = 0.8m


Antenna factor (AF) of the 0.4m configuration of the BB monopole 80MHz to 712MHz. (AF = Electric field magnitude/ Voltage induced into the antenna load)

Antenna Factor BB Monopole Height = 0.4


Power density of the bulbous antenna at 20km with a 5W input power 350MHz to 2400MHz

Radiated Power With 5W Input to Bulbous Antenna


Bulbous antenna gain 350MHz to 2400MHz

Bulbous antenna gain 350MHz to 2400MHz


Antenna factor (AF) of the bulbous antenna 350MHz to 2400MHz
(AF = Electric field magnitude / Voltage induced into the antenna load)

Antenna factor (AF) of the bulbous antenna 350MHz to 2400MHz (AF = Electric field magnitude / Voltage induced into the antenna load)


7.5cm and 10.5cm stripline calibration

7.5cm and 10.5cm Stripline Calibration

10.5cm Stripline Calibration for 50V/m

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<![CDATA[E and H Field Probes]]>https://www.emcconsultingantennas.com/e-and-h-field-probes/https://www.emcconsultingantennas.com/e-and-h-field-probes/Wed, 17 Feb 2021 6:16:15 +0000These small antennas and probes are designed to measure the susceptibility of PCBs, ICs or small equipment to high levels of E and H fields. One use was measuring the susceptibility of the memory in an aircraft black box. The IC was powered by an external battery or battery and linear regulator external to the antenna containing the IC. The fields described here were achieved using a R&K A009K251-4949R 9kHz – 250MHz 75W power amplifier.

A step up/ step down transformer useful from 0.01MHz to 10MHz is available from EMC consulting and the calibration of this is supplied under Calibrations:

See Calibrations

Using the step down feature with any of the H field antennas/probes a higher level of current and magnetic field is achieved.

Custom antennas can be manufactured with different dimensions and frequency range than those described here to suit the EUT or PCB size.

8mm Stripline
8mm Stripline

This antenna can theoretically develop 7600V/m but practically the limit is 1500V/m due to voltage breakdown. The upper frequency limit is very high due to the small gap between the ground plane and the upper plate and it has been tested from dc 250MHz. The dimensions may be increased to suit any PCB size.

Price: $1000US | $1300CAN, with calibration

8cm and 14cm Stripline
8cm and 14cm Stripline

The 8cm version of this antenna can develop 620V/m at 75W and 0.3-30MHz and the frequency range is approximately dc – 375MHz.

The 14cm version can generate 360V/m and the upper frequency limit is approximately 200MHz,

Price: $1000US | $1300CAN, with calibration

10cm Stripline
10cm Stripline

The 10cm stripline can develop 614V/m from 0.3MHz to 30MHz when used with the step up transformer and the frequency range is dc – 300MHz. The calibration for this antenna is shown under Calibrations.

7.5cm, 10.5cm, 12.7cm and 18cm high Stripline
The stripline at 7.5cm, 10.5cm, 12.7cm and 18cm height
7.5cm, 10.5cm, 12.7cm and 18cm high Stripline

They can generate a minimum of 50V/m with a 20W input level. Calibration is shown under Calibrations. This antenna can accommodate EUTs with the following dimensions and the upper frequency limits are:

Maximum EUT size | Upper Frequency
10cm Diameter H Field Loop Injection Probe
10cm Diameter H Field Loop Injection Probe

This antenna has been calibrated to generate from between 0.49 to 0.116A/m from 10 to 300MHz although higher levels are possible at higher power levels, typically 2A/m.

Price: $1000US | $1300CAN, with calibration

Resonant H Field Injection Probe
Resonant H Field Injection Probe

This antenna can generate very high currents and therefore fields at the resonant frequency. It has been tested with a step down transformer to more closely match the impedance of the power amplifier. The antenna shown in the photo has been tuned to resonate at 13.65MHz and this can be changed by modifying the value of the capacitors. The probe can be ordered with a resonance of between 3.6MHz to 35MHz. The gap between the winding is 6mm, the length is 6.8cm and the width 11.5cm. The maximum H field is approximately 250A/m. The calibration is shown under Calibrations.

Price: $1000US | $1300CAN, with calibration

0.01 to 10MHz Step Up / Step Down Transformer
0.01 to 10MHz Step Up / Step Down Transformer

The ratio as a step up transformer when loaded with 450 Ohm is from 2.7 to 3 and for a step down transformer when loaded with 5.6 Ohm ranges from 0.4 to 0.1. The calibration is shown under Calibrations.

Price: $150US | $190CAN

Parallel Plate E Field Probe

This can be made to almost any dimension and with the step up transformer can develop typically 1800V/m and up to 18,000V/m. It is useful for measuring the susceptibility of small PCBs and ICs. Price: TBD

Solenoid H Field Probe

This can be made to almost any dimensions and with the step down transformer can develop up to 800A/m. Price: TBD

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<![CDATA[0.14-1MHz H Field Antenna]]>https://www.emcconsultingantennas.com/0-14-1mhz-h-field-antenna/https://www.emcconsultingantennas.com/0-14-1mhz-h-field-antenna/Wed, 17 Feb 2021 6:07:20 +0000Small Low Frequency Transmitting or Receiving 0.14MHz to 1.0MHz Antenna

Low frequency E field antennas are usually large or have a high antenna factor (ratio of incident E field divided by the voltage developed across a load (usually 50 Ohm) = E/V. A 0.1MHz dipole would be 1500km long. Many small E field antennas are active including a high input amplifier or impedance converter or designed to be connected to a high input impedance amplifier or converter , and so are used for receiving only. Other E field measuring devices are probes providing a dc voltage output but have a low sensitivity. Many low frequency small antennas are H field antennas. Compared to other low frequency E field antennas designed to be loaded with 50 Ohms this antenna’s dimensions are very small 25.4cm (10 inches) x 20.5cm (8 inches) by 5cm (1.75 inches) deep. Because the antenna contains a resonant circuit by changing the component values the frequency range of the antenna can be modified. Although the gain is low and the Antenna Factor is high it is still a useful E field measuring antenna and can develop 1.7V/m at 1m and 2.5V/m at 0.5m at 0.33MHz and with a 75W input. The antenna is useful to measure shielding effectiveness. As an example the shielding effectiveness achieved when a black box is mounted in an aperture in a planes vertical stabilizer. Two of these antennas were used, one to develop the E field and the other to measure the induced voltage. The antenna dimension is slightly smaller than the aperture and the shielding effectiveness is the ratio of the antenna induced voltage when the antennas are measured on an open field test site divided by the induced voltage when the antenna is located in the aperture at the same distances. The dimensions of this antenna can be modified as required.

0.14MHz to 1.0MHz H Field Antenna
Front View of Antenna
0.14MHz to 1.0MHz H Field Antenna
Rear View of Antenna

The plastic fitting can be supplied with almost any dimension desired. The antenna can be made waterproof. As the antenna measures the near E field the calibration is dependent on the closeness of the source when used as an E field measuring antenna and from the antenna to the object illuminated by the antenna when used as a transmitting antenna. Calibration at 1m is provided under Calibrations. The antenna can be made with almost any dimension. The larger the dimensions the higher the gain, the lower the antenna factor.

Price: $2500US | $3200CAN (Including calibration at a specified distance).

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<![CDATA[Bow Tie Antenna 30-1000MHz]]>https://www.emcconsultingantennas.com/bow-tie-antenna-30-1000mhz/https://www.emcconsultingantennas.com/bow-tie-antenna-30-1000mhz/Wed, 17 Feb 2021 6:04:44 +0000Bow Tie Antenna 30-1000MHz

One of the two bow tie sections is 10cm long and 5.4cm at the widest point. It incorporates a balun to make it a balanced antenna and the frequency range is 20MHz to 1000MHz. It is very useful in measuring the E field generated by a EUT enclosure or cable from 10cm to 20cm distance It is also useful in a measuring the incident field in a radiated immunity/susceptibility test.

Price with calibration: $490US | $640CAN

Typical calibrations:

See Calibrations

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