CN202308297U - Loaded bow-tie pulse antenna for delay line resistor - Google Patents

Abstract

The utility model discloses a loaded bow-tie pulse antenna for a delay line resistor, in particular to a resistor loaded pulse antenna which consists of bow-tie radiation patches (1), a medium substrate (2), delay lines (3) and loaded resistors (4), wherein the bow-tie radiation patches and the delay lines and the loaded resistors (4) which are distributed on the delay lines are arranged on two sides of the medium substrate (2). One close ends of the two bow-tie radiation patches are feed ends (5) of a bow-tie pulse antenna, and the other ends of the two bow-tie radiation patches are feed ends (5) are radiation ends (6) of the bow-tie pulse antenna. A plurality of delay lines (3) are arranged on the area of the back surface of the medium substrate (2) contained by the two bow-tie radiation patches (1), one ends of the delay lines (3), in close to the radiation ends (6), are connected with the radiation ends (6) of the antenna through a metallization through hole, and the other ends of the delay lines (3) are converted on a convergent point (7) together with the tail ends of other delay lines (3) in the same area, or open-circuited. According to the resistor loaded pulse antenna, the amplitude of pulse stretching can be reduced, and the adverse effects to the antenna radiation efficiency are reduced.

Description

Delay line resistance loads the knot pulse antenna

Technical field

The utility model relates to a kind of pulse antenna, and especially a kind of delay line resistance loads the knot pulse antenna, belongs to the technical field that pulse antenna is made.

Background technology

During pulse antenna pulses of radiation signal; Pulse current flow to from antenna input antenna end during this period of time in; If pulse antenna can not all radiate electromagnetic energy, have the remaining pulse current that does not radiate at the aerial radiation end, the residual impulse electric current can return along original path in antenna; In process after this, continue the electromagnetic radiation energy, therefore can form tail pulse.When pulse antenna is used for GPR, these tail pulses with from the signal of target at the time domain overlaid, thereby target signal generating is disturbed, therefore to take measures to reduce the influence of tail pulse in the pulses of radiation waveform usually.The knot antenna is as a kind of pulse antenna, and it is wide to have a working band, makes advantages such as simple.The application of knot antenna is very extensive, and more application is also arranged in GPR, and its main radiation direction is the normal direction on plane, knot paster place.At present, for the knot pulse antenna, the method for reduction tail pulse influence commonly used is the resistance Loading Method, but resistance loads the radiation efficiency that can reduce antenna.

Summary of the invention

Technical problem:The utility model purpose is to propose a kind of delay line resistance to load the knot pulse antenna, and this antenna can effectively reduce the tail pulse amplitude, and is less to the influence of antenna radiation efficiency simultaneously

Technical scheme:The delay line resistance of the utility model loads the knot pulse antenna and comprises a pair of knot radiation patch, medium substrate, delay line and loading resistor; Wherein the knot radiation patch is positioned at the one side of medium substrate, and delay line, loading resistor are positioned at the another side of medium substrate; Loading resistor is distributed on the delay line; The close the inner of two knot radiation patch is the feed end of knot pulse antenna, and the other end is that the radiation of knot pulse antenna is terminal; Some delay lines are positioned at the zone at the medium substrate back side that two knot radiation patch are comprised; Each regional delay line one end is connected with the radiation end of antenna through the metallization via hole, the other end or with other delay line ends with the zone intersect at delay line convergent point, or open a way.

Described knot radiation patch be shaped as triangle or fan-shaped;

Delay line is printed, etching perhaps is placed on the medium substrate, or is suspended in the air above the medium substrate.

Delay line be shaped as straight line or hair clip shape, its length is half the greater than the high workload wavelength of antenna;

Loading resistor is the resistance of lumped parameter form or is the resistance of the distributed constant form of resistance with the loss of delay line itself.

There are some discontinuous places on each bar delay line, it are connected, constitute the current path that delay line resistance loads by loading resistor.Pulse signal is at first imported from the feed end of knot pulse antenna; The radiation that is transmitted to antenna is terminal; The radiation end of antenna not the residual impulse energy of radiation get into the delay line that resistance loads through the metallization via hole; Delay line is that the electric current of residual impulse energy provides additional current paths, and the loading resistor on the delay line will consume the residual impulse energy that gets into current path, make the tail pulse amplitude reduce greatly.Through the number of metal via hole that links to each other with some delay lines, the terminal residual impulse energy of knot pulse antenna radiation can as often as possible get into delay line, the more effective influence that reduces tail pulse.Because delay line is at the back side of knot radiation patch main radiation direction, the energy emission on main radiation direction does not exert an influence delay line to the knot pulse antenna in the space that it occupies; And because the effect of blocking of knot paster, the residual impulse energy on delay line towards the energy of main radiation direction radiation seldom.Because loading resistor does not absorb the pulse current of knot radiation patch, this kind resistance load mode is also less to the adverse effect of antenna radiation efficiency simultaneously.The distribution mode of resistance on delay line of the resistance sum of adjustment loading resistor, adjustment loading resistor, the number of delay line, the length of delay line etc. can change the amplitude of tail pulse in the pulse signal.

Beneficial effect:The beneficial effect of the utility model is; The resistance that the knot pulse antenna has been carried out the band delay line loads; Effectively reduce the amplitude of tail pulse in the radiation waveform, broadening the impedance bandwidth of antenna, reduced the adverse effect of loading resistor paired pulses antenna radiation efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Have among the figure: knot radiation patch 1, medium substrate 2, delay line 3, loading resistor 4, the feed end 5 of antenna, the radiation end 6 of antenna, the convergent point 7 of delay line, metallization via hole 8.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

The technical scheme that the utility model adopted is: delay line resistance loads the knot pulse antenna and is made up of knot radiation patch, medium substrate, delay line and loading resistor; Wherein the knot radiation patch is positioned at medium substrate one side, and delay line and distribution loading resistor on it are positioned at the opposite side of medium substrate.Two knot radiation patch are shaped as triangle or fan-shaped, are positioned at the same surface of medium substrate, and two close ends of knot radiation patch are feed ends of knot pulse antenna, and the other end is that the radiation of knot pulse antenna is terminal.Delay line is positioned at the zone at the medium substrate back side that two knot radiation patch are comprised, and makes the radiation of delay line on the antenna main radiation direction blocked by the knot radiation patch like this, thereby the radiation of antenna is not exerted an influence.The medium substrate back side in each knot radiation patch is distributed with some delay lines; These delay line one ends are terminal near the radiation of antenna; Link to each other through the plated-through hole that penetrates medium substrate with the radiation end of antenna, the other end perhaps intersects at the convergent point of delay line, perhaps open circuit.There are some discontinuous places on each bar delay line, it are connected, constitute the current path that delay line resistance loads by loading resistor.Pulse signal at first adds from the feed end of knot pulse antenna; The radiation that is transmitted to antenna is terminal; At the radiation end of the antenna delay line that loads of the resistance that gets into through the metallization via hole of the residual impulse energy of radiation not; Delay line is that the electric current of residual impulse energy provides additional current paths, and the residual impulse energy of radiation does not get into the tree-like delay line that resistance loads through metallized via hole, has avoided the tail pulse that causes because of the terminal reflection of aerial radiation; Loading resistor on the delay line will consume the residual impulse energy that gets into current path, make the tail pulse amplitude reduce greatly.Through the number of metal through hole that links to each other with some delay lines, the terminal residual impulse energy of knot pulse antenna radiation can as often as possible get into delay line, the more effective influence that reduces tail pulse.Delay line printing or etching or stick on the medium substrate also can be suspended in the air.Because delay line is at the back side of knot radiation patch main radiation direction, the energy emission on main radiation direction does not exert an influence delay line to the knot pulse antenna in the space that it occupies; And because the effect of blocking of radiation patch, the residual impulse energy on delay line towards the energy of main radiation direction radiation seldom.Simultaneously because the resistance pulse current of absorbed radiation not, this kind resistance loads also less to the adverse effect of antenna radiation efficiency.The distribution mode of resistance on delay line of the resistance sum of adjustment loading resistor, adjustment loading resistor, the number of delay line, the length of delay line etc. can change the amplitude of tail pulse in the pulse signal.

Structurally; This delay line resistance loads the knot pulse antenna and is made up of knot radiation patch 1, medium substrate 2, delay line 3 and loading resistor 4; Wherein knot radiation patch 1 and delay line 3, loading resistor 4 lay respectively at the both sides of same medium substrate 2, and loading resistor 4 is distributed on the delay line 3.One end of knot radiation patch 1 is the feed end 5 of knot pulse antenna, and the other end is the radiation terminal 6 of knot pulse antenna.Some delay lines 3 are positioned at the zone at two knot radiation patch, 1 pairing medium substrate, 2 back sides; Each knot radiation patch 1 right medium substrate 2 back sides be distributed with two or some delay lines 3; These delay lines 3 perhaps intersect at the convergent point 7 of delay line near an end of knot pulse antenna feed end 5; Perhaps open a way; Each bar delay line 3 is terminal at its other direction, promptly near an end of the radiation terminal 6 of antenna, links to each other with the radiation terminal 6 of antenna through the metallization via hole 8 that penetrates medium substrate 2.Can be rectilinear wire between two ends of each bar delay line 3, also can be the hairpin lead, the length of delay line is half the or more greater than antenna maximum functional wavelength usually.The metallization via hole 8 of the radiation of connection delay line 3 and antenna terminal 6 can be metal column or hollow metal via hole.Be distributed with loading resistor 4 on the delay line 3, loading resistor 4 can be the resistance of distributed constant form, and this moment, delay line 3 itself was a lossy transmission, and loading resistor 4 is provided by the loss of transmission line; Also can be the resistance of lumped parameter form, exist some discontinuous places on each bar delay line 3 this moment, by loading resistor 4 it is connected.Delay line 3 constitutes the current path that delay line resistance loads with loading resistor 4.

On making, the manufacturing process that this delay line resistance loads the knot pulse antenna can adopt semiconductor technology, ceramic process, laser technology or printed circuit technology.This delay line resistance loads the knot pulse antenna and is made up of knot radiation patch 1, medium substrate 2, delay line 3 and 4 of loading resistors; Wherein knot radiation patch 1 is made up of the good conductor material of electric conductivity; Shape can be triangle or fan-shaped; Be positioned at the same surface of medium substrate 2, medium substrate 2 is wanted the alap dielectric material of service wear.Delay line 3 is produced on the opposite side of medium substrate 2; The length of delay line is half the or more greater than antenna maximum functional wavelength usually; Therefore can be rectilinear wire between two ends of each bar delay line 3, perhaps be made as the hairpin lead to guarantee the delay line long enough.Be distributed with loading resistor 4 on the delay line 3, loading resistor 4 can be the resistance of surface mount resistor or band lead-in wire; Also can be with the bigger lead of resistance as delay line, at this moment can be less with or without loading resistor, the conductor resistance of delay line itself has just replaced the effect of loading resistor.

According to the above, just can realize the utility model.

Claims (5)

1. a delay line resistance loads the knot pulse antenna, it is characterized in that this delay line resistance loads the knot pulse antenna and comprises a pair of knot radiation patch (1), medium substrate (2), delay line (3) and loading resistor (4); Wherein knot radiation patch (1) is positioned at the one side of medium substrate (2), and delay line (3), loading resistor (4) are positioned at the another side of medium substrate (2); Loading resistor (4) is distributed on the delay line (3); The close the inner of two knot radiation patch (1) is the feed end (5) of knot pulse antenna, and the other end is the radiation terminal (6) of knot pulse antenna; Delay line (3) is positioned at the zone at medium substrate (2) back side that two knot radiation patch (1) are comprised; Its inner convergent point (7) that perhaps converges at delay line of each regional delay line (3); Perhaps open a way, another of every delay line (3) is terminal to be connected with the radiation terminal (6) of antenna through metallization via hole (8).

2. delay line resistance according to claim 1 loads the knot pulse antenna, and what it is characterized in that described knot radiation patch (1) is shaped as triangle or fan-shaped.

3. delay line resistance according to claim 1 loads the knot pulse antenna, it is characterized in that delay line (3) is printed, etching perhaps is placed on the medium substrate (2), or is suspended in the air above the medium substrate (2).

4. load the knot pulse antennas according to claim 1 or 3 described delay line resistance, what it is characterized in that delay line (3) is shaped as straight line or hair clip shape, and its length is half the greater than the high workload wavelength of antenna.

5. delay line resistance according to claim 1 loads the knot pulse antenna, it is characterized in that loading resistor (4) is the resistance of lumped parameter form or is the resistance of the distributed constant form of resistance with the loss of delay line itself.